We are gonna see what we can do Cat Back wise on the SS.

Based on my experience with Magnaflow they should produce a mellow yet agressive tone with un-mattched real world horsepower gains.

They really haven't played with the SS yet but have had great gains with the solstice GXP and Sky Redline.

I will post before and after dyno graphs (dyno jet) once the system is complete.:thumb: :smile:

We are gonna see what we can do Cat Back wise on the SS.

Based on my experience with Magnaflow they should produce a mellow yet agressive tone with un-mattched real world horsepower gains.

They really haven't played with the SS yet but have had great gains with the solstice GXP and Sky Redline.

I will post before and after dyno graphs (dyno jet) once the system is complete.:thumb: :smile:Ask them if they need to dyno an auto as well, just for GP ;)

Ask them if they need to dyno an auto as well, just for GP ;)

I will know where to go if they want to walk that path:):thumb:

Ive been calling Magnaflow about once a month about our catback system and their site says in stock, but when I call, they say
the system is not in production yet, this was last week????? Are you going in as a test mule or do they actually have the SS catbacks???

Ive been calling Magnaflow about once a month about our catback system and their site says in stock, but when I call, they say
the system is not in production yet, this was last week????? Are you going in as a test mule or do they actually have the SS catbacks???

They will be using my car as a test mule. (I was the development coordinator/lead dyno operator a couple years ago:thumb: )

I do not think they have an SS specific system complete yet. I think they built the kit for the 2.2/2.4 and it fit. I think engineering has held up production because they believe there is more to gain with the kit on the 2.0T

I know he wants to try 3" pipe and see if they can eliminate the resonator.

I am hoping for something that is still quiet on the inside while making good HP.:bow:

I am hoping for something that is still quiet on the inside while making good HP.:bow:And NOT sound like a ricer with a fart can muffler!

Ive got a HRC tuner coming and wanted this Magnaflow system too! If you can please make sure the low end torque isnt less with the new catback+magnaflow wont sell this system if it does sound Ricey:eek: IMHO

I think we will want sound clips ASAP after it's done.

I am sure they will do everything possible to make a great sounding legal system that makes power.:cool:

I will keep you posted with pics. I don't have a video camera that would capture good sound.

Sooooo, what did Magnaflow say????????:nuts:

Sooooo, what did Magnaflow say????????:nuts:

Got the car back last night.

Car made 250whp 249wtq sae on there dyno jet stock (1200miles/4th gear).

3" Catback made a tad over 7 whp

3" Catted down pipe (single cat) made the same

Together the car dynoed at 265 whp 269 tq

In my opinion its a tad loud (I don't like loud) with both peices installed. We are gonna do a 3" core resonator in the same place as the factory peice to try and make it a little quieter.

Car sounds good...nice tone

You can feel the extra tq

I think there is more to be had but the computer is gonna fight you all the way. The new PCM seems to adjust boost accordingly. The car actuually picks up power when the engine temp is at 200(compensates for heat with boost).

I think with a tune the car will make 300+ whp with DP/CB:thumb:

I hope to have pics and dyno graphs later today(waiting on email)

Sound clip? Very interested in hearing it.

Sound clip? Very interested in hearing it.

http://www.magnaflow.com/04sound/04sport.asp#chevy

scroll down to the HHR section and click on the video. It has one launching and doing a drive by.

I would expect it to be a tad quieter once finished.

(gonna post pics and dyno graphs in SS section in a tad..just got info)

Sounds good!

Sounds good. I can't do loud inside though. I'll have to hear it for myself when you get the 3" cherry bomb installed :lol:

Was that your car in the video clip? I wasn't able to tell since I couldn't see the monster size front license plate holder and rock chip :D :poke:

Sounds good. I can't do loud inside though. I'll have to hear it for myself when you get the 3" cherry bomb installed :lol:

Was that your car in the video clip? I wasn't able to tell since I couldn't see the monster size front license plate holder and rock chip :D :poke:

dick....

If you get anything it's gonna have a whistle tip;):thumb:

Info/pics and dyno charts now listed in SS section....

http://chevyhhr.net/forums/showthread.php?t=16643

dick....

If you get anything it's gonna have a whistle tip;):thumb:

:lol: Nice. The wife will love that.

At least you will have a monster stereo to fall back on if the cherry bomb doesn't fix the inside resonating ;) :thumb:

:lol: Nice. The wife will love that.

At least you will have a monster stereo to fall back on if the cherry bomb doesn't fix the inside resonating ;) :thumb:

It will be quieted before it goes on sale.....I tend to be a little finiky about noise.

Nice thing is eventhough it's loud there isn't drone:cool:

It will be quieted before it goes on sale.....I tend to be a little finiky about noise.

Nice thing is eventhough it's loud there isn't drone:cool:

the drone is my major concern, so good to hear that there isn't any!!!
and if you feel it's quiet enough after they make the change, that works for me....:D

That sounds good. I want that! I saw a price of around $500, would that be fore catback only or the full turboback?

SOUNDS GREAT!!! :thumb:

Very similar to the sound I'm getting on my 2006 2LT HHR.

Had my Magnaflow installed last spring of 2007 and very pleased with the mellow yet agressive tone and increased free-flowing hp gain.

(only problem is the slight increase in tone inside - but doesn't bother me at all)

That sounds good. I want that! I saw a price of around $500, would that be fore catback only or the full turboback?

Catback only:)

Down pipe will be a different part #.

Magnaflows prices are fair and in line with others. All the other guys are selling a combined kit for arond $800:thumb:

Catback only:)

Down pipe will be a different part #.

Magnaflows prices are fair and in line with others. All the other guys are selling a combined kit for arond $800:thumb:

Can't wait. I want one!

I called Magnaflow and they said 4-6 weeks. List price for the catback was high $600's. No plans for a turboback because it would delete the cats and not make it street legal.

But then I see Cole has a Magnaflow DP listed... did this delete the cats?

I called Magnaflow and they said 4-6 weeks. List price for the catback was high $600's. No plans for a turboback because it would delete the cats and not make it street legal.

But then I see Cole has a Magnaflow DP listed... did this delete the cats?

Hopefully the msrp will be less? you can usually get there stuff for a decent amount cheaper through online dist. (high 600's seems steep to me:))

They will be selling a catted 49 state down pipe. Pretty sure they won't be making a catless DP. (no idea when they mill make it)

The car will throw a code without tuning or the right amount of catalyst so the non catted DP would be no bueno for me in CA.

was looking under the car friday(before it went back to the deal)and noticed the piping from the turbo to the second cat is nice sized,looked like 3in. then from cat back, looked like 2.5 cole,can you confirm this???

was looking under the car friday(before it went back to the deal)and noticed the piping from the turbo to the second cat is nice sized,looked like 3in. then from cat back, looked like 2.5 cole,can you confirm this???

Pretty sure stock dp is around 2 7/7 -3"

c/b is 2.5":thumb:

Also I thought I heard the stock DP had a rather restrictive bottleneck near the turbo, could be wrong.

I know a non catted DP will throw codes I never asked for a non catted DP, a catted DP that flows better would be just fine. Does the stock system just have just one cat?

Also I thought I heard the stock DP had a rather restrictive bottleneck near the turbo, could be wrong.

I know a non catted DP will throw codes I never asked for a non catted DP, a catted DP that flows better would be just fine. Does the stock system just have just one cat?

it has two. i agree ANYTHING will be better than stock. plus 20whp is a great gain.

Okay so Magnaflow DP would be one cat?

Also 20whp gain with 2.5 turboback is what you are saying, correct?

If so, that would put an HHR SS with a Hahn tune and a turbo back around 300 WHP.

actually around the 310ish. according to hahn(all cars are different) the tune alone put it at 290 to the wheels.

Also I thought I heard the stock DP had a rather restrictive bottleneck near the turbo, could be wrong.

I know a non catted DP will throw codes I never asked for a non catted DP, a catted DP that flows better would be just fine. Does the stock system just have just one cat?

2 cats...

I don't tink the DP is that big of a bottleneck. It's actually fairly straight with a coupld crushes around the cats. (pretty decent for a stock part)

Most of the magnaflow down pipe hp will come from cats that flow more. A non catted DP will make more power but be very loud. (I won't do this in CA;))

Okay so Magnaflow DP would be one cat?

Also 20whp gain with 2.5 turboback is what you are saying, correct?

If so, that would put an HHR SS with a Hahn tune and a turbo back around 300 WHP.

All the parts on my car are 3".

On my bone stock car it made 15 peak and 20+ under the curve at the wheels.

All cars are different but I would imagine you could be close to 300-310whp with exhaust/DP and tune.

All the parts on my car are 3".

On my bone stock car it made 15 peak and 20+ under the curve at the wheels.

All cars are different but I would imagine you could be close to 300-310whp with exhaust/DP and tune.

3" okay, that's better. 300-310whp would be a good number! No one, and I mean no one would expect that out of an HHR haha.

No one, and I mean no one would expect that out of an HHR haha.

sure they would...but only another HHR SS owner in the know of these parts ;) haha

sure they would...but only another HHR SS owner in the know of these parts ;) haha

Okay, lol, well I kinda excluded HHR SS owners who are in the know.

I now have my HRC tune! Where's the Magnaflow!!!!!!!:nuts: LOL

How's this developing?

Called MF and they said call back every 3 weeks at this point.

How's this developing?

Called MF and they said call back every 3 weeks at this point.

I haven't heard anything...... they are gonna run builds on what ever is in demand and selling. If only 4 people are inquiring and they are 100 catbacks behind on another part # you can guess what they will build.:smile:

so,will maganaflow make them for individual sale??? what i mean is,if only say like 10 of us are willing to buy,will they do it??? pretty much like a group buy. i'm sure we can round up about 10 people to do this if need be. really want to see the hahn unit first.

There is really not too much you can do to a simple cat back exhaust. I agree with mightymouse about a Hahn catback, but honestly I dont think it is a high priority to them right now. My only concern is that the system is tested on an SS and wont throw cel's with our new tune! Magnaflows Im sure will be cheaper in the long run being that you can buy threw jobbers and get a much better price. List $650 est., my jobber says around $450. Magnaflow is notorious for being slooooow!!:red: