took it in at 9 30 like he asked me and Jerry was great and a fellow Goldwinger, WOOOOOOOOOOOOT.
made it even better

he has been doing mufflers and custom work for over 30 years. nice
family shop him and his help outside and his wife inside.

i pulled in and he said one didnt show so i was next and they drove
it as we were talking inside.

he did a great job on alignment, asked me if i liked it on all steps, and
then when he got the muffler aligned and tip right, he tacked the tip on
so it wouldnt move.

as soon as they started it to drive it out,,, man what a nice low sound
on idle and starting. nice low howl when you take off,,, what i want and
the cool thing is it is quieter at cruising speed.

what a nice addition and making it sound like a nice beefy engine.
pick up is better 0 to 60 seems quicker and i need to find a 1/4 mile
somewhere to get a time on it now.

less weight, nicer sound, better power and pick up and looks awesome,,,
what is not to like and the bonus for me it is from the town my Family
started in when they moved from German and Czechoslavakia to Texas

it turned out great and I LOVE it.
http://i22.photobucket.com/albums/b305/cktuba/HHR%20Project/100_0587.jpg
http://i22.photobucket.com/albums/b305/cktuba/HHR%20Project/100_0585.jpg
http://i22.photobucket.com/albums/b305/cktuba/HHR%20Project/100_0584.jpg
http://i22.photobucket.com/albums/b305/cktuba/HHR%20Project/100_0583.jpg

Man you don't still for a minute with those mods, looks good CJ.

I wonder if that model is the same as for the 2.4 too?
Do you know?

mike put the same one on his LT2 2.4 so you use the same.
i talked to Cowboy on the cell and he heard it and loved it.

the sound clips are accurate and maybe even a little brighter on idle

Jerry said that the pipes under were 1 3/4 and this is 2 1/4 so they made a lil swedged converter extension off the original pipe to make it fit. took like 2 minutes. he used the original hangars and just bent hangar rods to make it hit and line up. he had to bend the exhaust hangar in front of the muffler a little to get it in the middle.

he gave me enough room to clean around and it looks good.

got a car show tonight at 5 to 5 30 and this will be the first car show since i got the front seats done. Next weekend or tomorrow afternoon i do the rear seat.

Man this things sounds good. just got back from getting some brisket to smoke and then bake in the oven for tomorrow. i love the low idle. It turned heads,,, was cool

WOOOOOOOOOOOOT

Funny Musician Update on the IMCO T924

Pitch on the muffler is now Ab,,, one note below the tuning Bb on my tuba. it pitched an A for like 15 seconds and then settled on Ab... good brass tone

AWESOME find
Love it more now

Heh so when do we get to hear a symphony with you and your HHR?

CJ looks great like everything you do.What make and model of tip? Here in this L. A. area burb IMCO T924 and install would be $120.
Told neighbor about your Texas Headliner.

Charles

Here in this L. A. area burb IMCO T924 and install would be $120.

And worth every penny! :beer:

I highly recommend it! :one:

Reminds me of the ebay tea pot for sale incident....

http://www.filehigh.com/serve/4900/145569.jpg

Hey; - at least CJ was wearing shorts! :eek:

:D

Can you take a few steps away from the car and take a shoot from the back and also a few steps over to the left so I can see a sideway shot.

Reminds me of the ebay tea pot for sale incident....

http://www.filehigh.com/serve/4900/145569.jpg

I missed that one... :confused:

Hey CJ, did you hurt yourself taking those pictures? :lol: The man's laying on the ground inpersonating a human pretzel just to take the pix. Way to take one for the forum Cj :thumb:

http://i22.photobucket.com/albums/b305/cktuba/HHR%20Project/100_0585.jpg

Looks great CJ!!! And it sounded great on the phone. I can't wait to get back from Atlanta this next week so we can get together so I can hear it in person. I'm wanting to do something with my exhaust too, but I have to be careful as I use mine for surveillance and can't have too much noise sitting idle. It tends to draw attention to my self in the summer when I'm sitting in a residential neighborhood with the A/C running in the summer time. It's pretty quiet right now and I don't want to miss that up.

CBL

I played catcher in baseball for over 40 years. 3.5 years of tournament karate fighting. i think i have it down on the squating for pic positions.
i did not realize it showed up in the pics....... i was laughing the whole time i was posting this reading the comments... still am

tomorrow i will get back and take a rear and 2 side shots so you can see the tip.

the tip is a Cyclops- 3R Racing is the company-----vato zone...i really like the large oval
I got lucky one day and was looking for a tip and didnt like the one i had on and they had it on sale for 14.99 from 24.99

thanks for telling him about the Headskins, i was the first in the business in
1985 making those and one time was selling around 20 to 30,000 a year.
Made a decent living for a while doing it.

Lookin good CJ

oooooooh. Now I must have one.

the farther back and side shots
just for SIHHR
http://i22.photobucket.com/albums/b305/cktuba/HHR%20Project/100_0593.jpg
http://i22.photobucket.com/albums/b305/cktuba/HHR%20Project/100_0592.jpg
http://i22.photobucket.com/albums/b305/cktuba/HHR%20Project/100_0594.jpg
http://i22.photobucket.com/albums/b305/cktuba/HHR%20Project/100_0595.jpg

On your advise I ordered one and will let you know how I like it once it arrives and I get it installed. Thanks for the advise.....I don't like the sound of the stock one at all :thumb:

You will love it bigtime.

Daughter, Aura, rode with me today going to check out this one car show and loved the lower sound so we are going to put one on her Cobalt with a 2.2. i just measured it and she has the same OEM muffler i had on the HHR.

you should figure a way to chrome your rear wiper i think itd go with your theme :D

I am sure that if i looked hard enough i could find a chrome arm wiper that size.

Here is mine:
http://www.chevyhhr.net/gallery/files/3/7/6/Tip8.JPG
http://www.chevyhhr.net/gallery/files/3/7/6/tailpipe4.JPG
http://www.chevyhhr.net/gallery/files/3/7/6/tailpipe7.JPG

Tip is Silverline TK 7819.

Sounds deeper and beefer outside barely any louder :one: inside. Mike's sound clip is very accurate.
Install was done by Best Muffer in La Crescenta, CA
www.http://best-muffler.com

Charles

Looks awesome and very very familiar
must be a blond day.

i see him squatting but he is in his work clothes. LOL

Did you stay with stock piping?

i did for now but that will change.
side note i was told that if i put a turbocharger on it i will need to change that
i am relying on friends that race but none race the 2.2 ecotech.

like always i really do alot of reading and asking before i change something that drastic.

i can tell you i am really having fun w Shaggy now.

Did you stay with stock piping?

*Note, The stock HHR exhaust pipe is mandrel bent and offers plenty of flow. Increasing the size would cause poor performance with an otherwise stock engine. The ecotec engine needs a certain amount of back pressure, decreasing it will hurt performance. There's really no need to go any bigger unless you build your motor (and do some serious reprogramming to the engine management system!). The IMCO Turbo muffler provides a nice boost. Coupled with a decent air intake it will give a good power increase.

Hope it helps,

You will love it bigtime.

Daughter, Aura, rode with me today going to check out this one car show and loved the lower sound so we are going to put one on her Cobalt with a 2.2. i just measured it and she has the same OEM muffler i had on the HHR.
I got mine put on yesterday. So far I am happy with it. It sounds great at low speeds and doesn't have that loud drone at high speed some of them have that can be so annoying. I hope it doesn't get more quiet as it breaks in though.
Has anybody used a glass pack yet?? :thumb:

Has anybody used a glass pack yet?? :thumb:

Huh, do you think they would be legal on an emissions contolled vehicle? :confused:

Not by a long shot. Cherry bombs and glass packs are pretty much out the window when it comes to emissions not to mention voiding your whole warranty on your HHR.

That's what I figured. :(

I am not as limber as CJ, took awhile to get up!!

Charles

Well I'm adding the IMCO to my to-do list for the HHR :roll: After the wheels of course!

Ng

I am not as limber as CJ, took awhile to get up!!
Charles
hey and i am 52
glad you said get up and not get it up :rof:

Update on the IMCO T924
put one in the daughters cobalt and big time better match to it than HHR

what was amazing is it is quieter all around and better pick up and will see about mileage

it really changed her LS with the 2.2 in it
i really had fun in it coming home

it had a really bad whine in the exhaust system between 70 to 80 and that is all gone.

it runs great and sounds awesome
my daughter came home from school, went for a drive and couldnt take the smiles off her face if you tried.

hey and i am 52
glad you said get up and not get it up :rof:

I'm same age :bow:

Charles

Better pics of tip

http://www.chevyhhr.net/gallery/files/3/7/6/Tip22.JPG

http://www.chevyhhr.net/gallery/files/3/7/6/Tip21.JPG

Charles

Not by a long shot. Cherry bombs and glass packs are pretty much out the window when it comes to emissions not to mention voiding your whole warranty on your HHR.
I'm not a mechanic by any means but what is wrong with a glass pack as far as the EPA is concerned? :surprised

In Texas glass packs are actually legal.
Problem is if there is a decibel level law then they can get you on that but they are legal as mufflers and now they pack them alot better than they used to.

In Texas glass packs are actually legal.
Problem is if there is a decibel level law then they can get you on that but they are legal as mufflers and now they pack them alot better than they used to.
I wondered because I've had them on a number of cars and never had a problem with the noise being too loud. My motorcycle is WAY louder than any glass pack has ever been and I don't have any trouble with my bike either.

So everyone that has it loves it.

So everyone that has it loves it.
big time and more and more the longer i have it
daughter thinks her LS cobalt is hotter than ever now.

very happy in this family for what we paid

I like mine so much I don't want to put a cat-back on!
The sound right now is perfect - deep & throaty!

I am concerned that it may be too quiet. I am used to hearing the engine while I am driving. What is it like inside the car? I would even consider a glasspack, but would it have too little back pressure? Utlimately I want the car not only to sound nice, but to be faster :smile:

It is faster - you can feel it. Even in neutral reving it, you can tell it's breathing better. 5-minutes after putting mine on I could tell it helped performance. Sorry no dyno charts. We tried several types of mufflers before settling on this one. Most offered too little back pressure for the engine. This particular IMCO (#924), is "just right"

Sound; at startup and idle it is noticeable that it's "not stock." Under normal driving conditions it can be heard in the cab, but not in a "droning" way like fart cans. where it is really noticeable is when you put your foot in it. then it is apparent the engine can breathe freely and make more power.

Here's a short video clip: HHR Exhaust Testing (http://www.socalhhr.citymax.com/f/HHR_Testing_sm.wmv)

For the money, you just can't go wrong with this muffler. It leaves just enough breathing "room" for more power with an intake later.

Hope it helps,

See the list of MODS of done to mine.
well the ones I'm listing on my signature ....
who has more mods???

I think CJ still has you beat; - he has around 40 mods now.

Hey - if you have a Gibson; how come we haven't heard the sound clips yet??? :confused:

CJ ....has more ..mods... then great...

As I mention... as the ones I've only listed... :lol:
others might supecede ... my one might over/be worth 10...

It's really nice at idle cause you can hear it idling this nice low sound. i couldnt hear it before in front of the house and now i can just hear it.

reving is awesome, fricking limiter makes it no fun
put your foot in it and ohhhhhh soooooo niceeeeeeeeeeee (thinks that is in a Kinks song) and you really feel it.
such a nice low throat sound going through all the gears and just seems like it is not working as hard as much now. because of the lightened week teaching i didnt drive as much and i took my bike out too,,, been a great week on motorcycle after the rain went away.
at cruise at high spped it is barely there which is nice,,, low and throaty at idle and a nice bark going through the gears and then quiet when cruising. kind of like the Van Halen song Best of Both Worlds.

for as reasonable of a mod as one can get,,, this is one you cant go wrong with and Mike is spot on and it makes it more fun to me to drive.
Just one more great reason to get me in it,,, like i need one.
bought 10-1-05 and about to roll over 13,000.

Its also nice.. to hear your car rev in neutral... and theres no limit to it..


:nuts: :lol:

CJ ....has more ..mods... then great...

As I mention... as the ones I've only listed... :lol:
others might supecede ... my one might over/be worth 10...
Mods I Have Done and not in order
LS with
1. auto trans w remote start
2. onstar
3. 1 yr safe and sound
4. 4 wheel ABS
5. side curtain air bags
6. XM radio
7. Pioneer 7 spkr amplified system
8. CD/MP3, RDS and Aux input jack
9. front license plate mount
10 ash tray and lighter
11. running boards, color keyed
12. custom splash guards
13. rear bumper cover

Mods I Have Done
1. Vision Chrome Wheels- Discount Tire
2. Two tone custom paint job- Caliber Collision, Plano, TX
3. painted front bumper
4. painted door handles
5. painted back Chevy bowtie
6. I designed a Italisized HHR logo with a dropped R, painted on back on each side and cleared
7. bass clef and connected curved decrescendo logo ghosted on both sides on both doors
8. Pilot Fog Lamps
9. Stainless Exhaust Extension- 3R Racing
10. Polished Chrome Grille- Chevy
11. Chrome 1949 Chevy License Plate
12. Chrome roof rails- Chevy
13. Matching Spoiler- Chevy
14. HHR 3rd brake light decal
15. 1/4 in. Chrome molding around edges of rear window
16. 1/8 in. chrome molding around the front 4 passenger and driver windows
17. 1/4 in chrome molding around back side windows
18. 1/8 chrome trim around front windshield
19. 1/8 chrome trim around tail lights
20. 1/4 in chrome trim on spoiler
21. Wheel well molding completely around the whole mid-line
22. 1955 Chevy Script Emblems- posts cut, sanded level, then 3m taped and applied to hood
23. Grey suede leather Steering Wheel wrap- Auto Zone
24. Shorty multi length radio antennae
25. 57 Chevy Script on back
26. Chevy bowtie visor decals
27. Chevy radio speaker script above radio
28. 2 tone painted front seats
29. added painted bowtie on top middle of front seats
30. Shaggy doll in remembrance of my Son Sean's passing 5-1-05
31. changed out front 4 6.5 in speakers to Blaupunkt
32. Texon HID replacement 8500K headlight bulbs
33. CJS HHR personal custom plates
34. Chevrolet script on front grille
35. Blue Chevy stem caps
36. Replaced stock horn with 2 88 caddy horns
37. IMCO T924 Muffler
38. lowered lock buttons
39. replaced stock tires with Goodyear H rated Eagle GPS
40. Upgraded mats and have both standard and upgraded, standard during week and then Upgraded on weekends or shows.
41. tinted front windows

Got mine installed yesterday and it sounds great. Am hoping to take some pics this weekend once I get all my decals on if they come in. Not sure what brand the tip is, but receipt says 3 1/2" DW Chrome tip. Total install with labor & tax was $168.60...but things are alot higher priced here in Denver. Definitely makes it sound way better than stock muffler. Thanks to Mike at SoCalHHR for his guidance and to CH for answering my PM. :bow:

I get mine installed tomorrow morning. Woohoo! :breakdanc

I got mine yesterday. (Fast service-I ordered it Sunday night.) Can't wait to get it installed, but first I have to take it to the track and time it for a baseline. Now I really must get down to Englishtown VERY soon.

Mine came today. Order yesterday!
:nuts:
Having it put on Monday:breakdanc

for those of you that have this muffler, what size tip did you go with. i think im getting this for my birthday so i need a tip.

Mine's being installed Monday.:nuts:

I plan on re-using the stock tip, I really like the way it looks.

http://www.chevyhhr.net/gallery/files/8/9/2/small16.JPG

http://www.chevyhhr.net/gallery/files/8/9/2/small14.JPG

These are from the infamous Flowsound:( install.

for those of you that have this muffler, what size tip did you go with. i think im getting this for my birthday so i need a tip.

I didn't have a tip on it when I got the car and we threw on one of those cheap little ones that screw on just to dress it up. The one I bought when I had the IMCO installed...didn't ask the name...but invoice says 3 1/2" DW Chrome tip. Should be taking pictures this weekend...weather permitting...but it's been raining the last couple days so I'm gonna have to wait for a better day for pics.

anybody know a shop that carries this muffler in the los angeles area?

anybody know a shop that carries this muffler in the los angeles area?
just call a shop near you, tell them what you want and that you want a quote for the IMCO T924 installed..

they have distributors in CA
http://www.imcoweb.com/distributors/california.htm

thanks for the reply cj. I found that site last night listing a local distributor around my area. Just have to call them this morning to find info.

EDIT:

I just called one distributor and they wanted $415 for the muffler? lol

thanks for the reply cj. I found that site last night listing a local distributor around my area. Just have to call them this morning to find info.

EDIT:

I just called one distributor and they wanted $415 for the muffler? lol

I would order one online and then take it to a regular muffler shop and have them put it on. I know that I saw a place where someone ordered one online from here http://www.fle-online.com/ which is where I believe yeshua with the Victory Red HHR ordered his. Might want to double check...but I believe I'm right and that he said he only paid $36 total and it arrived in only a couple days.

I am going to end up ordering this online. Thanks for the info everyone.

I am going to end up ordering this online. Thanks for the info everyone.

No problem...that's what is so great about this group. :smile: We work together for the good of others. :thumb: Glad we can be of assistance. I know that I would certainly be lost with out it. This group is :one:

No problem...that's what is so great about this group. :smile: We work together for the good of others. :thumb: Glad we can be of assistance. I know that I would certainly be lost with out it. This group is :one:
We is da BEST
above the rest
:rof:

Yup, that was me. Ordered it in the afternoon and got it THE NEXT DAY!!!

$28.90
+ 6.04
$34.94

I couldn't believe how quick it got here. I called them and they were really helpfull. I highly recommend them.

Can't wait until Monday and I can here it.

Still got the Flowsound (comin' off Monday), free to any undeserving home!:lol:

Yup, that was me. Ordered it in the afternoon and got it THE NEXT DAY!!!

$28.90
+ 6.04
$34.94

I couldn't believe how quick it got here. I called them and they were really helpfull. I highly recommend them.:
what site did you order it from?

https://www.fulllineexhaust.com/cgi-bin/shopper.exe?preadd=action&key=IMCT-924

thanks!:thumb: :one:

I just had mine installed this past Friday when I went up to Dallas to meet up with CJ. I'm loving it. I'm enjoying the deep sound. It'll quiet down once the carbon builds up, but still has a deep hum though after hearing CJ's.

Here's a couple photos of mine that were taken today. I am loving the way it sounds and Henry thinks it sounds way better now. Definitely worth the money to upgrade. :thumb:

http://www.chevyhhr.net/gallery/files/8/1/2/0514856-R1-046-21A.jpg

http://www.chevyhhr.net/gallery/files/8/1/2/0514856-R1-048-22A.jpg

http://www.chevyhhr.net/gallery/files/8/1/2/0514856-R1-010-3A.jpg

Hey! Nice sticker!

http://www.chevyhhr.net/gallery/files/8/1/2/0514856-R1-046-21A.jpg

:thumb:

Hey! Nice sticker!

http://www.chevyhhr.net/gallery/files/8/1/2/0514856-R1-046-21A.jpg

:thumb:
speaking of stickers, what are the chances of you making those same stickers but with your website, at least for the 2 windows? might be a little free advertising for you.

Best muffler in La Crescenta, CA 91214 carries IMCO that is where I got mine
http://www.Best-Muffler.com
tip was SilverlineTK 7819

Charles

speaking of stickers, what are the chances of you making those same stickers but with your website, at least for the 2 windows? might be a little free advertising for you.

Ummmm......we do have them in both sides right HERE (http://www.socalhhrs.com/catalog/item/2608356/2367684.htm).

It's a 3 piece set (2-sides and back window)
Has our company name & logo - easy to find on the web. :thumb:

Had the IMCO 924 installed today.

:confused: I think the cheapa$$ Flowsound sounded better. The 924 does sound better than the stock, but compared to the one I just had taken off, the 924 is quiet.

I just hope that the performance is better as many on this forum have promised because on sound alone I'm very disapointed and feel like I should have kept the Flowsound on it and just replaced it when it shot craps.:(

You can always put the flowmass back on and sell the T924
i am sure someone will want it

Yeah, i know. but this is already the second I have put on.

What's done is done. Plus it could well out-perform the other.

I'm just glad to be done futzing with it.:smile:

Had the IMCO 924 installed today.

:confused: I think the cheapa$$ Flowsound sounded better. The 924 does sound better than the stock, but compared to the one I just had taken off, the 924 is quiet.

I just hope that the performance is better as many on this forum have promised because on sound alone I'm very disapointed and feel like I should have kept the Flowsound on it and just replaced it when it shot craps.:(


I hate to say I told you so..

Plus it could well out-perform the other.

And it will. The proof is in the pudding Bro! :one:

Drive it a while and see...

Mike I think we need to see some new pics of the Lead Sled..

Yeah, i know. but this is already the second I have put on.
What's done is done. Plus it could well out-perform the other.

I'm just glad to be done futzing with it.:smile:
sound isnt everything and i know how good mine runs with the T924.

Thanks! I'm on it...

I had mine installed today at a local Good Ole Boy muffler shop. Now if Ya'll are ready for this part.....it cost me $49.95 installed!:thumb: They ordered it for me from their distributor, and had it in stock in 1 day. I had them reuse the stock stainless tip because I actually like the way it looks. Sounds much better than stock!:thumb: :thumb:

I had mine installed today at a local Good Ole Boy muffler shop. Now if Ya'll are ready for this part.....it cost me $49.95 installed!:thumb: They ordered it for me from their distributor, and had it in stock in 1 day. I had them reuse the stock stainless tip because I actually like the way it looks. Sounds much better than stock!:thumb: :thumb:

49.95!!!...Now that's a deal! Hopefully I can get that kind of deal when I'm ready for my muffler. I also like the 2LT Tip. I'll be telling them to use it when I do my muffler.

Ng

Ordered mine! Now just have to get the time, money and place to install! :thumb:

installation shouldnt be that expensive. I paid less than $50 for installation and new chrome tip.

My install was $35 and I re-used the chrome tip already on the car.

My install was $35 and I re-used the chrome tip already on the car.

You left out the headache part. :lol:

You left out the headache part. :lol:

What an understatement! :lol:

(Inside joke about yeshua's install story) :D

What an understatement! :lol:

(Inside joke about yeshua's install story) :D

http://www.hhrclub.org/smilies/os2/catmftx.gif

Order last week, arrived yesterday, installed today! It is definately worth all the hype! The guys at the shop asked me why I went that muffler and I told them about the recommendations from here and why...they weren't impressed with the sound, but its perfect to me! Not too loud, but definately not stock. Most of the other cars in the shop were boasting fart cans and duals, so it was quiet in comparison. I love how it sounds when I put my foot on it...this is my first mod and now Im an addict (grilles are on the way as we speak)! Check the pics here (http://chevyhhr.blogspot.com/)-

Order last week, arrived yesterday, installed today! It is definately worth all the hype! The guys at the shop asked me why I went that muffler and I told them about the recommendations from here and why...they weren't impressed with the sound, but its perfect to me! Not too loud, but definately not stock. Most of the other cars in the shop were boasting fart cans and duals, so it was quiet in comparison. I love how it sounds when I put my foot on it...this is my first mod and now Im an addict (grilles are on the way as we speak)! Check the pics here (http://chevyhhr.blogspot.com/)-

I had mine installed last week and I'm very happy. I didn't want the large folger's coffee can exhaust like the ricers! The IMCO was perfect for what I wanted...

Ng

OK, I've read the thread and am convinced that a lot of folks like the sound! But, is the performance noticeably better?
Better gas mileage?
I am interested in more get-go in the midrange. It is only the last 1/3 of pedal travel that really gets me anywhere once at cruising speed ( around 50MPH ).
I have a 2.4 automatic and love it a lot, but better gas mileage and performance are always welcome as long as these quests do not make the car too much louder:eek:
I have nerve damage in my ear and often have an earplug in just to cope with life. Loud engines etc are no longer welcome in my world :( I'll be selling one of my convertibles with the dual exhaust /four carburator setups this summer partly due to its wonderful noise ! :cool: :D :(

I'd like to aspirate the car better with a new intake and muffler if the combo does not add too much to the noise level ( Again, noise welcomed by many, but not necessarily by me ). These mods should lead to better gas mileage AND better performance. I read maybe 4 HP for the exhaust and another 4HP for the intake if I remember correctly.
So, should I go this way? The gains sound subtle, but I'd like to hear from folks who've done the exhaust and/or the intake combo. Much louder? Better MPG? Better performance? This thread is good, but folks seem to mostly talk about the sound.

OK, I've read the thread and am convinced that a lot of folks like the sound! But, is the performance noticeably better?
Better gas mileage?
I am interested in more get-go in the midrange. It is only the last 1/3 of pedal travel that really gets me anywhere once at cruising speed ( around 50MPH ).
I have a 2.4 automatic and love it a lot, but better gas mileage and performance are always welcome as long as these quests do not make the car too much louder:eek:
I have nerve damage in my ear and often have an earplug in just to cope with life. Loud engines etc are no longer welcome in my world :( I'll be selling one of my convertibles with the dual exhaust /four carburator setups this summer partly due to its wonderful noise ! :cool: :D :(

I'd like to aspirate the car better with a new intake and muffler if the combo does not add too much to the noise level ( Again, noise welcomed by many, but not necessarily by me ). These mods should lead to better gas mileage AND better performance. I read maybe 4 HP for the exhaust and another 4HP for the intake if I remember correctly.
So, should I go this way? The gains sound subtle, but I'd like to hear from folks who've done the exhaust and/or the intake combo. Much louder? Better MPG? Better performance? This thread is good, but folks seem to mostly talk about the sound.

Honestly, at first I was disapointed that it wasn't louder!! LOL:D

So you don't have to worry about it being too loud.

I really haven't noticed that much of a performance difference because I changed mine out so quickly.

Plus, I've been having so much fun driving it that my driving style hasn't been the best for MPG's!:steering:

I can say though that I get 30+ on the hwy and average 25+ overall. Hope that helps.

Honestly, at first I was disapointed that it wasn't louder!! LOL:D

So you don't have to worry about it being too loud.

I really haven't noticed that much of a performance difference because I changed mine out so quickly.

Plus, I've been having so much fun driving it that my driving style hasn't been the best for MPG's!:steering:

I can say though that I get 30+ on the hwy and average 25+ overall. Hope that helps.


Sounds good! :smile: The mileage is nice. We average 24- 27MPG and I'd like to get a bit more. I notice it is better when I'm at 50ish MPH and worse when I'm enjoying 70-80 MPH.
I'm sure I'll be a little heavy on the foot too when the mod happens!

Hey, are you going to change the intake as well? The whole aspiratating the engine thing does best with both the intake and exhaust opening up a bit.
I'm going for a different intake if it does not void the warrantee and it does not sound like a garbage disposal on high:eek: :lol:

ok so this is not working i think my car is slower now ? i had what i was told was a imco t-924 but a newer version ,from what i have read and now seen pics of i do not have the imco, so make sure u get what u want , as i will now buy the muffler as told by others and have the new one i just got today taking out , if any ones knows is it just what i think or can the car be slower :( the muffler i got is shorter and wider then whats posted as to the imco muffler thanxs mike! sorry did not mean to take over this thread just thought it had more user's back to the shop!

Order last week, arrived yesterday, installed today! It is definately worth all the hype! The guys at the shop asked me why I went that muffler and I told them about the recommendations from here and why...they weren't impressed with the sound, but its perfect to me! Not too loud, but definately not stock. Most of the other cars in the shop were boasting fart cans and duals, so it was quiet in comparison. I love how it sounds when I put my foot on it...this is my first mod and now Im an addict (grilles are on the way as we speak)! Check the pics here (http://chevyhhr.blogspot.com/)-

really hard to kill enthusiasm
love it
congrats
i love my T924 on my HHR, daughter loves hers on her cobalt

anyone w a cobalt needs this muffler,,, takes the 70 to 80 mph drone the cobalts have and makes it alot quicker

ok so this is not working i think my car is slower now ? i had what i was told was a imco t-924 but a newer version ,from what i have read and now seen pics of i do not have the imco, so make sure u get what u want , as i will now buy the muffler as told by others and have the new one i just got today taking out , if any ones knows is it just what i think or can the car be slower :( the muffler i got is shorter and wider then whats posted as to the imco muffler thanxs mike! sorry did not mean to take over this thread just thought it had more user's back to the shop!


that muffler looks too wide to be the T924 everyone is installing.

that muffler looks too wide to be the T924 everyone is installing.
which means too much airflow and not enough resistance and so less ummmmmmmmmphffffffff

What CJ & HHR PNOY said. Looks like the wrong "can" to me.

Best bet: order off that site I posted and wait a few days - it's the real deal...

Best of luck!

the site mike's talking about is the same site I ordered mine from. Didnt have any problems with them at all.

Got mine installed today. Mad Hatter's in Mesa $40 and kept the factory tip. Nice sound, not the loud rice grinder sound either. :thumb:

Add me to the list. Got mine installed today. $45 and 25 minutes. Easy. Sounds great, light rumble, not ricer. Thanks for the info on this muffler Mike! :D

Mine is in transit! Searching for that perfect tip before the install..... I have sumptin' in mind.. gonna be a hard one to find from my searches so far!

we got are's fixed what a diff, got the true imco t-924 , and made a great diff , i was funny how bad the car ran with the first one they told me was a imco , no mid range and top end , bog city they change it out and BAM power is back thanxs again mike for the info , now too get the white one done , :cool: found a local shop selling the mufs for 22.00 bucks what a deal , :D

Got mine installed today. Nice sound. Mellow man, mellow.

Got mine installed today. Nice sound. Mellow man, mellow.


Has a nice deep sound doesn't it. You can feel your HHR breathe better too. Welcome to the IMCO T924 family. :cool:

Now I want one! Out of those of you that installed the imco, did anyone reuse the OEM chrome tip? My idea is to keep it looking stock,ie, mild sleeper

Now I want one! Out of those of you that installed the imco, did anyone reuse the OEM chrome tip? My idea is to keep it looking stock,ie, mild sleeper

Grumpee...you won't believe the difference in sound and power. I was totally amazed by the difference. My boyfriend thought I was nuts replacing a perfectly good muffler...but once he heard how great it sounded and then drove it...he agreed I did the right thing. :thumb:

A lot of people have used their stock tip, but mine didn't come with one, so until I replaced the muffler I used one of those chrome screw on tips. Then when I had the muffler installed, I had them put on a real nice double walled one at the shop for an extra $50.

http://www.chevyhhr.net/gallery/files/8/1/2/0514856-R1-048-22A.jpg

I've read all 11 pages of this thread and seen posts like "you can hear the exhaust flow better" or "you can feel the difference".

Just wondering if anyone has any dyno sheets to prove the improvement? I know people can easily misconstrue “hearing” a louder or nicer sounding exhaust with “feeling” more power.

Only reason I ask is because I’ve been down that road before buying exhausts because people keep “feeling” the added power, but in the end, the stock exhaust was proven to outperform.

If you want to keep your stock tip, they can probably just weld it on for you if you ask them. Majority of the muffler shops probably won't even charge you extra for it. It takes them but a few seconds to just tack it on for you. Either way, you'll feel a lot better getting rid of that doggone turtle. :thumb:

Now I want one! Out of those of you that installed the imco, did anyone reuse the OEM chrome tip? My idea is to keep it looking stock,ie, mild sleeper

Yup! They just cut it off and welded it back on.

http://www.chevyhhr.net/gallery/files/8/9/2/small16.JPG

Hmmm. That does NOT look like an IMCO 924 Mike?

See the rolled lip:

http://www.socalhhr.citymax.com/i/IMCO%20Muffler/9_Weld_Rear_Hanger_On.jpg

Why doesn't yours have one? :confused:

Good eye, that's the first one that began my exhaust drama.:roll: It does show though that the stock end can be reused.

Good eye, that's the first one that began my exhaust drama.:roll:

Oh yeah, now I remember...:D

I knew you had an IMCO! :thumb:

Got mine installed today. Mad Hatter's in Mesa $40 and kept the factory tip. Nice sound, not the loud rice grinder sound either. :thumb:
I was wondering if you bought the Imco on the Internet, or did you find it locally? I see that Allied Exhaust Systems in Mesa is listed as an Imco Dealer. Thought you might have bought it there??

I was wondering if you bought the Imco on the Internet, or did you find it locally? I see that Allied Exhaust Systems in Mesa is listed as an Imco Dealer. Thought you might have bought it there??

Most people I believe are buying them online at Full Line Exhaust (http://www.fle-online.com/), as they have a very reasonable price (less than $40 shipped). Then they are having them welded on by their local muffler shop. Hope this helps.

I've read all 11 pages of this thread and seen posts like "you can hear the exhaust flow better" or "you can feel the difference".

Just wondering if anyone has any dyno sheets to prove the improvement? I know people can easily misconstrue “hearing” a louder or nicer sounding exhaust with “feeling” more power.

Only reason I ask is because I’ve been down that road before buying exhausts because people keep “feeling” the added power, but in the end, the stock exhaust was proven to outperform.

Anyone???? :confused: :confused: :confused:

Contact Mike from SoCalHHR's...if memory serves me right, he may have had a Dyno done after IMCO install.
I do remember something being said about an 8hp increase. I could be all wet here...but I don't think so.
I may be getting older, but I don't think I'm losing all my faculties yet. :lol:

On another note, for those of you who don't have a stock factory stainless steel tip.
When you have your muffler installed, be sure to get a STAINLESS STEEL tip and not a CHROME PLATED tip.
Being new to mods and all, I didn't realize the huge difference between the two and bought the chrome plated one.
See pictures below.

Old chrome plated tip with about 1,000 miles on it.
Rusted and looks like crap. Place I bought it said paint it. :(
I don't think so...not on my new HHR. :lol:
http://www.chevyhhr.net/gallery/files/8/1/2/cid_A03.jpg

New Stainless Steel tip. :D
Went somewhere else and they put on new one and centered muffler, as it was off center a bit.
Also painted muffler welds so they weren't visible. :smile:
http://www.chevyhhr.net/gallery/files/8/1/2/cid_A02.jpg

EZ4U...
Your previous post was part of a near flame-war (for lack of a better term) :lol:. Deb's correct in her statement - Mike (SoCal) had his ride dyno'd for an intake comparision (Airraid vs. CGS). All thing's being equal - he listed what *other* mod's were done to his ride that *may* have improved the numbers a bit over a stock ride (synth lubes, IMCO muffler, stickers :lol:, etc...). I don't have the thread handy - but it's (very) searchable.

I hear you on your previous sentiments about buying a product just to have the OEM *outperform* the aftermarket piece :roll: (been there + done that = NOT COOL:red:). In trying to learn from my mistakes, I've requested (from SoCal AND Manuf's direct) PROOF of the Gibson cat-back performance. Not kicking Mike here (it has absoluetly NOTHING to do with him nor SoCalHHR's!!!) - but Gibson has *never released* any type of factual % increase or dyno charts. As far as I'm concerned, the stated increase is their opinion until otherwise proven... which is not SoCal's responsibility.

Legit or not... the ~8hp increase previously discussed WAS from dyno's on Mikes ride WITH varying intakes ... although he didn't release dyno results - just summaries (just stating the facts to avoid going 'down that road again'). :thumb: This info can be found on SoCal's site.

All-n-all- the less restrictive (more attractive) muffler *should* net something (more than stock)... and for the price - you can't really beat it. That goes without mentioning your ride would sound better than the stock sewing machine whizz it currently produces.

As I usually state- I'm hopeful that this post hasn't offended anyone... that's not the intent. Simply trying to summarize and state the facts in a non-biased form.
BTW- lest not forget that it *WAS* Mike that posted the IMCO upgrade (!:thumb: !) and he doesn't even carry them!!! PROPs Mike.

Not to sound like a jerk but I highly doubt swapping just your muffler to a cheap muffler is going to get you 8 HP on our tiny 4 cylinders. 8 HP is what both Gibson and Magnaflow are claiming for their entire cat-back systems I believe.

I agree with CH, there no way you can get 8+hp by just swapping a muffler.

Thanks Scoot! Yes, I don't want to start a flame war by any means. I'm just real curious and cautious, and it sounds like you've been in my shoes before having OEM perform better than aftermarket, so I'm sure you can see my concern.

Not to sound like a jerk but I highly doubt swapping just your muffler to a cheap muffler is going to get you 8 HP on our tiny 4 cylinders. 8 HP is what both Gibson and Magnaflow are claiming for their entire cat-back systems I believe.

Scoot stated that was with different intakes as well. I will search for the thread when i get a chance.

i got one of the first ones and i love the sound and there is no way there will be a 8 hp difference w a muffler but i will tell you that 1 to 3 might be more like it. the OEM does not perform better than the Imco T924

doesnt matter to me. these are facts with the IMCO T924
1. less weight- several pounds less
2. wonderful low sound
3. more pickup than before hands down
4. about a 1 around town and 2 on the highway mpg increase

for me the sound alone was worth the money to change it out. mine was $89 installed total.

Bottom line is, adding the IMCO T924 is something a great deal of people are doing. It's not going to turn our HHR's into rockets by any means, however, in my opinion, it sounds much better than the stock muffler and I can feel the increase in power after having it installed. For less than $100 you can buy the muffler and have it installed and hear and feel the difference yourself. Dyno numbers or no dyno numbers, those of us who have installed the T924 are very happy with the sound and performance.

Appears to me we are once again http://www.militantbreastfeedingcult.com/vbportal/forums/images/smilies/deadhorse.gif :lol:
But just so I can hopefully satisfy the curiousity of some...please read below.
Hopefully, this is not opening up another http://www.militantbreastfeedingcult.com/vbportal/forums/images/smilies/canofworms.gif

I belong to the other forum as well and found this information over there that was posted by Mike from SoCalHHR's. Not nearly as many posts to search thru over there. :lol:
Hopefully this should clarify some things.

MY HHR has been dyno'd 5 times now to prototype various HHR parts. With the change to an IMCO Turbo muffler and synthetic oil I am putting out right at 180hp (crank), compared to stock FW figures.


My claim of 180hp at the crank was just that - a claim. But never for a "stock" motor. Here's how we arrived at the number.

Stock 2.4L engine = 172hp + Mobil 1 Synthetic = 3hp, + IMCO Turbo Muffler = 5hp (minimum). Total = 180hp (crank).

Having modded cars for the past 34-years, and having changed and dyno'd hundreds of mufflers (as an automotive magazine editor for 20 of those years), I'm giving a conservative estimate with the benefits of the IMCO muffler. We have tried several mufflers here and found the IMCO T-924 provides the best combination of flow and back pressure the HHR's Ecotec engine likes to see. It's long been accepted in tuning circles that a switch to synthetic oil can net you an easy 3hp just from friction loss, so perhaps now you can see where my numbers came from.

We're not selling any snake oil here - just ask any of the members who have installed the IMCO muffler. Many had already tried other brands and can vouch for the superior driveability the IMCO offers. It's not the answer to a full cat-back system, but instead is an affordable mod which gives a modest power increase at a budget price. For the guy who can't afford a cat-back now, the IMCO will improve power while sounding "deep & throaty" rather than "ricey." It's a great entry-level mod that sets your HHR apart from the rest.

BTW - I don't sell them, but rather refer owners to a site that offers a good price on them.

Thanks CourtHouseDeb. I know this thread wasn't supposed to start a flaming war, and I hope it doesn't, but I'd like to see an actual dyno so I can see where the hp and tq increase is and at what RPM. I'm not concerned so much with peak numbers as I am with the results of the entire range.

The hp "guess" you quoted is what's referred to as ricer math, and I don't believe in it.

If it was only sound I was looking for, then yes, I'd probably be out in my driveway right now installing one of these.

Who knows, maybe I'll be the one to buy one AND get a before and after dyno to share with everyone.

SoCalHHRs: "We have tried several mufflers here..."

Link to "testing": http://www.socalhhr.citymax.com/imcomufflerinstall.html

:lol: :lol: :eek: :confused:

It is possible to dissagree without being disagreeable! You guys are doing great!

If Sindy's comment about "disagreeable" was aimed at me, it wasn't meant that way. Just pointing out what was stated and what is on the web site.

EZ, the sad fact is that there are no valid numbers that I've seen on the IMCO or any other muffler, whether on a dyno or strip. And how accurate are any manufacturer's claims?

No doubt, many here are happy with the sound and price of the IMCO.

One factor about the sound issue is that if it is too loud there can be an annoying drone while cruising. It can be especially bad in a wagon-type body like the HHR where the back is open.

On the HP issue, until someone can substantiate numbers, I would question any statement. My guess is that if there is any gain, it would be minimal. On the 2.4 the exhaust is 2.25", which should breath pretty good. There are other areas where real HP gains can be made.

In the meantime, go for the sound or the looks! :nuts:

My comment was not aimed at anyone. It seems that although there are varying opinions, everyone is remaining peaceful about it. I have seen other dissagreements that have gotten way out of hand.
I was making a compliment to everyone for stating their opinions without getting nasty about them. (Unless I missed something somewhere.)

One factor about the sound issue is that if it is too loud there can be an annoying drone while cruising. It can be especially bad in a wagon-type body like the HHR where the back is open.

there is no drone while cruising with a IMCO T924 on a HHR and it is only a little loud when you first have it installed. after a few weeks it is only throaty when you put your foot in the throttle.

there are sound clips of a couple HHRs with the 924 on it and you can find it if you do a search.

my daughter has a cobalt and it had the same stock muffler on hers that the HHR comes with. it has this drone with the OEM muffler between 70 to 80. we put the T924 on her cobalt with a 22 in it and it works better with her Cobalt than with the HHR. the really cool this is the drone is gone and the Cobalt is actually quieter overall and especially at cruise.

i can tell you that w 2 different cars using the same 2.2 engine and T924. the muffler is a winner.
all you have to do to find out is get one your self

SoCalHHRs: "We have tried several mufflers here..."

Link to "testing": http://www.socalhhr.citymax.com/imcomufflerinstall.html

:lol: :lol: :eek: :confused:

You could stay on my good side Joe - if you could ever get anything right.

Link to testing: Testing Video (http://www.socalhhr.citymax.com/f/HHR_Testing_sm.wmv)

We tested HHRs back to back, on the same runs with the IMCO against stock. There is a definite improvement. Additionally, we tested Magnaflow and Flowmaster mufflers and they didn't get past the "fall-flat-on-your-face-the-first-time-you-drive-down-the-street" phase of testing.

Bottom Line: the HHR engine likes to see a certain amount of free flow + back pressure to produce power. The IMCO provides it.

End of story.

Murieta Raceway? I know exactly where that's at! :thumb:

... but I'd like to see an actual dyno so I can see where the hp and tq increase is and at what RPM. I'm not concerned so much with peak numbers as I am with the results of the entire range.

The hp "guess" you quoted is what's referred to as ricer math, and I don't believe in it.

If it was only sound I was looking for, then yes, I'd probably be out in my driveway right now installing one of these.

Who knows, maybe I'll be the one to buy one AND get a before and after dyno to share with everyone.

EZ... dyno figures showing increases through the whole rpm band is what I was after as well. NO ONE's released charts, not even Mike. I'm not really sure why that is, but, seeing that he footed the bill- he's got every right to do what he feel's is best with 'em.
On the other hand... I guess I should have clarified earlier... the ~8hp gain previously stated was *with* Mikes mod's (synth's, muffler, stickers :lol: AND the CGS INTAKE). I too wasn't overly concerned with top end #'s - but since I don't have the extra flow to throw around, beggars can't be choosers.
If you have access to a (cheap) dyno to do before and after pulls ---> :thumb: !!! BE SURE TO POST THE RESULTS!!!
If not- completely understandable. I'm in total agreement ... net hp gain of just the muffler itself may be 2-3hp max.

From what we can tell (my car was never dyno'd stock vs. the IMCO), the muffler gain is 3-5hp max. If you are a sensitive driver, you will have no problem feeling the power improvement when going from stock to IMCO. The HHR breathes easier and pulls right off idle stronger than stock. I would imagine torque increase is closer to 5ft/lbs.

Of course, anyone here is more than welcome to take their stock HHR, dyno it, then add the IMCO and dyno it again. At $100/hour for the dyno we use - all to get "figures" for a muffler swap, I have MUCH better things to do with my time and money! :lol:

As I've said previously, Both in my personal automotive life, and during my career as a magazine editor, I have swapped and dyno'd hundreds of mufflers and exhaust systems and not only seen, but felt the results firsthand. Once you get that kind of experience under your belt, it's pretty easy to tell by changing mufflers and doing some timed runs down the street whether the new muffler is helping or hurting performance.

Let's put it this way, Gibson called me 3 weeks ago to take my HHR in for a full Cat-Back install for free and I declined...why would I do that? Answer: a) I can't stand the "ricey" sound the current cat-backs produce, and b) I'm quite satisfied with the performance I'm getting from the IMCO setup.

And yes I understand my saying this online might "hurt" my cat-back sales, but that's how I feel about it.

As usual, most of those with negative comments about the IMCO's benefits don't have them on their HHRS! :lol: (I mean really...c'mon, buck up, make the $50 investment and THEN come down hard on it!) I'm sure most any HHR owner who does have the IMCO installed will sing it's praises easily.

Hope it helps,

As usual, most of those with negative comments about the IMCO's benefits don't have them on their HHRS! :lol: (I mean really...c'mon, buck up, make the $50 investment and THEN come down hard on it!) I'm sure most any HHR owner who does have the IMCO installed will sing it's praises easily.

Hope it helps,

I hope that wasn't directed at me simply for asking if anyone had a dyno sheet??? I'm curious that's all, and no where did I make a negative comment about it.

Nope, not towards you at all. Rather some old members who just love to beat a dead horse. Try the IMCO though - you won't be disappointed. :thumb:

I'm curious that's all, and no where did I make a negative comment about it.

I don't think anyone has? :confused: I called it cheap but I was just referring to the price because it is cheap compared to most high quality mufflers like Magnaflow, Borla, or the like. :smile:

I hope that wasn't directed at me simply for asking if anyone had a dyno sheet??? I'm curious that's all, and no where did I make a negative comment about it.

That's just a general statement. We've been down this road before with not only the IMCO, but the intakes as well. All he is really saying is that it is not cost effective to have a dyno test done for a muffler that sells for less than $50. It's counter-productive and money that could be better spent on research and development of other products.

Each person who installs this muffler is going to draw their own opinion, based on their driving style. It's an inexpensive mod and those of us who have done it are pleased with the sound and performance. You should try one...and if you don't like it, you can put the old one back on and list the IMCO here in the classified section. I'm sure there are lots of people who would snatch it up in a heartbeat.

Bottom line...try it...you'll like it. ;)

Signed...a very happy HHR owner with an IMCO T924 :smile:

I don't think anyone wants to buy a used muffler? :confused: If you try it and don't like it you're probably better off tossing it in the garbage. :lol:

There you have it - one man's trash is another man's treasure! :lol:

Maybe it's just me. :confused: I've never really been into used parts, especially things like brake components, mufflers, tires, and so forth. ;)

Well, a "new used" IMCO muffler that was only on for an hour or two...I'd have no problems with that.

All he is really saying is that it is not cost effective to have a dyno test done for a muffler that sells for less than $50. It's counter-productive and money that could be better spent on research and development of other products.

That's assuming you only want the muffler for sound reasons. If you're looking for performance as well, it would be R&D.

I'm going to see if I can get a deal on some dyno time. If I can, I'll suck it up, go get a stock dyno, spend the money for the muffler and welds, and then another dyno with as close to the same conditions as I can get.

And yes I understand my saying this online might "hurt" my cat-back sales, but that's how I feel about it.

Hey!!! Looks like Mikes feeling a bit better!!! Welcome back ... let the FLAME WAR BEGIN!!!! (just kidding :p:)

Bottom line, EZ - just as others have stated... I wouldn't waste your dough on dyno pulls *just* for a muffler. "If" you can get a deal ... AND you have the money- you "might" want to do a 'power-adder' shoot-out:guns: . In other words, buy an IMCO, buy a Gibson, and buy an intake (or two) :eek:. Dyno the stock set-up, just the intake(s), just the IMCO, just the Gibson, then EVERYTHING (intake with cat-back... intake with IMCO)... whew.

All-in-all that'd run around $1500... not all lost $$ though (just the majority), as you'd be able to e-Bay off a couple of the items you don't use. Agreed- it's a LOT of flow to just find a few results- but it'd get you what your looking for!

From my point of view... if sound ISN'T your concern- you should foot the bill for a cat-back- knowing they'll make the 'most power'... as opposed to a FULL exhaust system. I've heard other members say they like the POWER and sound of their Gibson, but the 1st production release has *major* fitment issues. I'm assuming the 2nd release is coming soon - that's why they wanted Mikes car. Second - invest in an intake. Search the forum for (flame) threads... you should be able to make a decision from there. Also- as I understand it... the CGS unit is going through a (slight) upgrade as well. Mike should be able to provide more info on that front. Either way you go... an aftermarket unit WILL out perform the stocker.
I'm assuming you'd net somewhere around ~10hp (give or take) from investing in these components... money well spent when compared to the dyno.:roll:.
The problem we ALL have is that although there are aftermarket (performance and otherwise) parts for the HHR- the selection is still pretty much slim pickin's for the time being. I REALLY realize this when coming from the Mustang realm... what a difference :eek: (and for some reason Chevy aftermarket parts cost a LOT more!?!?!).
Good Luck and keep us posted on any progress/additions and opinions!
:thumb:

After reading the reply's, my concern is whether the POWER gained from the GIBSON CatBack is worth the money; when comparing it to the IMCO.

I have already bought and installed the CGS intake that I ordered from SOCALHHR. I can already feel the difference. I have ordered an IMCO; which should be here next week. My plan was to simply 'sell off' the IMCO, and buy the GIBSON CatBack. However I do not want my HHR sounding like a "16 year old's" hyped-up Dodge Neon. ( I only say that because many of the postings have talked about a 'sound' issue )

Anyhow, so now my plan is to have the IMCO installed when it comes in. If the HHR still needs an added boost, then I will look at the GIBSON again.

So before I install, can anyone tell me the 'approximate' POWER and SOUND difference between:

a>.. CGS intake with IMCO muffler

-VS-

b>.. CGS intake with GIBSON CatBack


If the POWER difference is minimal, then I will stick with the IMCO. If the POWER difference is major, then I may go with the GIBSON.

Thanks,

Michael

IMCO T924 took 20 minutes and $79.00. Sounds great and took short trip about 300 miles. Got 30.9 MPG and seemed to have a little more power.