Anyone hear of Walker Superflow Mufflers
are they any good?

I've never even heard of them. :confused:

Anyone hear of Walker Superflow Mufflers
are they any good?

Walker Superflow's are awsome mufflers. They're pretty quiet and out flow just about anything I've seen. There's an independent lab test floating out there on the internet, I don't know where it's at because I just stumbled on it a few months ago. They put them up against some very well known and popular mufflers and they were much quieter and flowed extremely better.

I talked with Mike and i am going to stick with IMCO.
Mike has tried many and said this was a great match with the HHR.

one of the things i found out about the IMCO is they are made in Schulenberg, TX
all my German and Czech relatives from my family are from Schulenberg, Shiner, St Marys and that area which to me is very very cool.

so i am getting the IMCO 924

Just to clarify what CJ said; there are lots of good muffler companies out there. The most important thing about choosing an aftermarket muffler is getting the muffler's flow rate compatible with the engines flow needs. Not enough muffler flow (like stock), will restrict the exhaust and cut some power. Stock vehicles often ship this way to be "EPA Friendly." On the other hand, too much flow does not provide enough back pressure for your engine, causing a loss of power. A fine balance is needed.

We tried several brands and types before settling on the IMCO. Most were too loud, and caused a "droning" in the HHR's cavernous interior. A few did not provide enough back pressure and caused sluggish performance. Just like Goldilocks we had to find the one that was "just right."

Even IMCO makes a wide variety of muffler styles and sizes. We chose their Turbo (*and a specific size/model), as it met all our criteria. Compact size, improved tone (but not too loud!), no droning, a noticeable power increase from the engine being allowed to "breathe" better, and enough back pressure to help on the hills.

I've been working with a supplier for a while trying to get the best pricing I can and am hoping to have these available on our site shortly. It's a simple mod any muffler shop can do in 30-45 minutes. and one that will make your HHR stand out from the rest at the stoplights and on the highway.

If you just don't have the pocket change for a full cat-back, the IMCO turbo is the way to go. I really love mine and don't think I'm going to add a cat-back. It's that much of an improvement!

Just wanted to clarify "why" I think this particular muffler is the way to go....

Oh, and we put up a "How-to" for those interested here: IMCO Turbo Muffler Install (http://www.socalhhr.citymax.com/imcomufflerinstall.html)

The muffler show that much improvement in power to the point where it changes your mind about adding a cat-back? Vast improvement..Keeps some money in the pockets...I'm sold!

No muffler is that good. :roll:

No muffler is that good. :roll:

I think it gives a 5-7hp increase - based on the HUNDREDS of mufflers I've installed on various vehicles in my lifetime. Gibson is claiming a 12-15hp increase with their cat-back, which frankly seems pretty high for a 4-banger.

I've tried to get dyno charts and sound clips from them, with no response. I even offered to bring my video gear up there to shoot a how-to install and record the actual sounds myself. Still no response.

The HHR's stock tubing is all mandrel bent with very smooth routing, the only major change with a cat-back is eliminating the stock resonator - which is a straight-through flow design anyway.

For someone not willing to part with the $$$ for a full cat-back, the IMCO Turbo is the best way to go . You WILL notice the improvement after you do the swap. I really like the tone of mine (*It actually sounds much better than the clips we recorded - the mics were placed straight on and too close to actually get an accurate sound).

Basically, I love the sound right now, enjoy some added power, and am AFRAID if I change it now I might not like the results! :lol:

Mike, don't get me wrong, I wasn't trying to sell CJ on the Walker Superflow. I was simply answering his question. The superflow quite frankly does outflow most of it's competition.....period. I also understand the importance regarding back pressure, flow velocity, etc. and have been building performance cars and drag racing for about 40 years. I'll be the first to admit that the superflow would most likely flow too easily for a 4 banger causing it to lose a whole bunch of low end torque. I appreciate all the work you've done in finding the best muffler available for the HHR in both the performance and sound aspects. As a matter of fact I love turbo mufflers and will most likely get an IMCO from you at some point. As far as performance improvement with nothing more than a simple muffler change I'll have to stand with Mike on this one. Over the past 4-5 years I've been playing with 4 bangers in the sport compact arena. We've seen some of the darndest things happen, especially at the drag strip and on a dyno. We've seen exactly what Mike talks about. I've seen some of these kids replace a muffler and gain HP and torque over stock, then later when they've saved up enough $$$ they swapped out their stock setup with aftermarket muffler to a complete catback system only to be dissappointed because they actually lost HP and torque to well below it's completely stock configuration.

No worries Dan - I didn't get the wrong message at all. :thumb: I just wanted to clarify that a "great" muffler name like Magnaflow, Flowmaster, or Walker doesn't necessarily translate to excellent performance on the HHR.

We have already seen how delicate the intake system is - that owners who are trying to fab their own short rams are having problems with the engine management system. I'm just happy we found an affordable solution that provides good power and tone without breaking the bank.

As an aside, I had an El Camino years ago with a dual exhaust system. We installed Flowmasters on it and it ran like puke. I ended up swapping back to the original "turbo" style mufflers to get better performance (*this was with intake, carb, cam/rockers and headers btw). Now some Flowmaster mufflers may sound great and add good power on some vehicles - but it was not the case with mine.

As always, your mileage may vary! :D

As an aside, I had an El Camino years ago with a dual exhaust system. We installed Flowmasters on it and it ran like puke. I ended up swapping back to the original "turbo" style mufflers to get better performance (*this was with intake, carb, cam/rockers and headers btw). Now some Flowmaster mufflers may sound great and add good power on some vehicles - but it was not the case with mine. :D

The same thing happend to me with my 56 BelAir. When I got it it had Flowmasters, but it was a bit to loud for my taste, so I replaced them with a couple turbo mufflers from Summitracing and gained gobs of performance. The engine was a SB 400 with a 350 crank yeilding 377 CID, Keith black pistons, "H" beam rods, scat forged steel crank, edlebrock aluminum performer heads, and matching intake, hooker headers, and a bunch of other goodies. Yeah, the right muffler can make a difference. :thumb:

Walker Superflow's are awsome mufflers. They're pretty quiet and out flow just about anything I've seen. There's an independent lab test floating out there on the internet, I don't know where it's at because I just stumbled on it a few months ago. They put them up against some very well known and popular mufflers and they were much quieter and flowed extremely better.

Is it possible that Walker either sold out or changed their name to Dynomax? Did a search for Walker and found a connction to this at Summit Racing....

http://www.amazon.com/gp/search/ref=nb_ss_/103-5693945-3484667?url=me%3DA1MK3HAFHEKCQU&field-keywords=dynomax&Go.x=0&Go.y=0&Go=Go

Note the part #WLK.....

i am off to get mine now and will have installed in the morning.
total install w tax guaranteed will be $90.
im pleased
i loved the sound clips
cant wait.
later guys

Is it possible that Walker either sold out or changed their name to Dynomax? Did a search for Walker and found a connction to this at Summit Racing....

http://www.amazon.com/gp/search/ref=nb_ss_/103-5693945-3484667?url=me%3DA1MK3HAFHEKCQU&field-keywords=dynomax&Go.x=0&Go.y=0&Go=Go

Note the part #WLK.....

Walker, Dynomax and Thrush are all the same company.

http://www.walkerexhaust.com/

back in 55 min w muffler a muffler
install in the a.m.

cant wait
37 mod will be done
sunday will paint back seat

back in 55 min w muffler a muffler
install in the a.m.

cant wait
37 mod will be done
sunday will paint back seat

cj, where did you get your muffler? Did you get it from Mike?

would removing the cat add hp?

Yeah but you wouldn't meet an emissions test and it's illegal to remove it on cars that came from the factory with it.

Unless the vehicle is meant for off road use of course. I had to add that before someone else pointed that out for me. ;) :lol:

cj, where did you get your muffler? Did you get it from Mike?
i found a local Lewisville muffler shop that quoted me a price of $90 including tax installed no matter what for a finished install.

i had one shop quote me $49 for the muffler plus instal so this is inline and they told me $35 to $50 for the install, so still about the same.

Yeah but you wouldn't meet an emissions test and it's illegal to remove it on cars that came from the factory with it.

We don't have emission testing here and usually remove the cat when we install a race header. Although I'm not removing the cat from my HHR cause I like the quieting effect it provides.

Lucky. :smile: They just started sniff testing us at inspection a couple of years ago. :( Of course you don't need a cat if you have like a pre '74 vehicle. ;)

I called around today to some local muffler shops for pricing. They quoted anywhere from $130.00 to $230.00 to install "any make of muffler"! A couple of them didn't even sound very interested when I mentioned performance mufflers. They said about all I'd get was more noise and droning inside the car and not much else for my money. Sort of knocked the wind out of my sails for now. Guess I'll have to check shops furthur from home!!

Your best bet is to order the IMCO T-924 Turbo online, have it shipped to you and get a local shop to weld it on.

Just sayin'...

Your best bet is to order the IMCO T-924 Turbo online, have it shipped to you and get a local shop to weld it on.

Just sayin'... YOU ARE SO RIGHT I HAD ONE PUT ON LAST WEEK AND MAN WHAT A DIFFERENCE. ALSO USED THE STOCK TIP.:thumb:

i went back to the same shop and asked if the muffs were the imco t-924's as i wanted he said yes they just had a new # , thats all but said they would be just as the old ones , what to do ? :roll: i,m going to have him do one car and go from there i will post pics thur night to see if u hhr owners think they are the same or i got taking if so then its road rage time, if not the same he's fixing it , i,v had other work done from them and its allways work , lets hope for the best :confused: just a note parts and labor ,$75.00 using my orig tip as i do like it

i went back to the same shop and asked if the muffs were the imco t-924's as i wanted he said yes they just had a new # , thats all but said they would be just as the old ones , what to do ? :roll: i,m going to have him do one car and go from there i will post pics thur night to see if u hhr owners think they are the same or i got taking if so then its road rage time, if not the same he's fixing it , i,v had other work done from them and its allways work , lets hope for the best :confused: just a note parts and labor ,$75.00 using my orig tip as i do like it THATS A GOOD PRICE.:thumb:

i went back to the same shop and asked if the muffs were the imco t-924's as i wanted he said yes they just had a new # , thats all but said they would be just as the old ones , what to do ? :roll: i,m going to have him do one car and go from there i will post pics thur night to see if u hhr owners think they are the same or i got taking if so then its road rage time, if not the same he's fixing it , i,v had other work done from them and its allways work , lets hope for the best :confused: just a note parts and labor ,$75.00 using my orig tip as i do like it

If you want to be sure, call Brent from IMCO. His number is 1-8---231-2390. Since he works for the company, he will know if you are getting a snow job.

i went back to the same shop and asked if the muffs were the imco t-924's as i wanted he said yes they just had a new # , thats all but said they would be just as the old ones , what to do ? :roll: i,m going to have him do one car and go from there i will post pics thur night to see if u hhr owners think they are the same or i got taking if so then its road rage time, if not the same he's fixing it , i,v had other work done from them and its allways work , lets hope for the best :confused: just a note parts and labor ,$75.00 using my orig tip as i do like it

The T-924 is a 5"9" oval can. I'd measure it before having it installed.

Here are the specifics:

Style: 5"x9" Oval Turbo
Inlet: 2 1/4" - Offset
Outlet: 2 1/4" - Center
Length: 16" Body, 22" Overall

Hope it helps,

mike does the muffler have any stamped info on it as a part # somthing i could look for before i have it put in , or could it be just a generic muff that they sell as a imco? i hate maybe's its like the car body restorations i do u want a daily driver or a straight show car there is no inbetweens :lol: sorry back to muffs:thumb:

No, they look pretty generic. That's the problem - there are probably dozens of muffs that look like the 924.
I'd want to verify first, because you want to get what you're paying for.

Why not just order it from the place in 'Bama online??? :confused:

I think it's worth the wait to get the one that works best.