GMMG CHAMBERD EXHAUST

[69RSZ]

If your undecided about an exhaust system for your Fbody check this out!!> http://www.gmmginc.net/media/Video/ChamberedExhaust.php

[emolineaux]

i would get rid of my magnaflow for a gmmg if i had the cash

[V]

too bad most of the cars they showed it on and had the sound weren't stock to begin with... eh its not bad, but i am happy with what i got.

[deadtrend1]

Im sold!

but your right Paul. Most were long tubed catless cars. And a couple with large cams

[chrisfrom nj]

sounds great

[Jersyboyy]

The blue ss towards the end from Jersey made we want this exhaust! I replayed that section close to 6 times! THAT EXHAUST ROCKS

[SteveR]

Their systems sound really good. I first heard them on the BlackBirds that came with them. If I got another 4th gen it would get that exhaust.

[edpontiac91]

It sounds fantastic, but don't forget, that was with a cammed, slammed, tubed LS1. It's gonna sound AWESOME! They say if fits 1982 to 2002. I will bet ANYONE that if you put that system on an L98 1992 350, or even an LT1, it's NOT gonna sound like that. My 1991 has had 3 different exhaust systems on it, starting with the SLP(2 pipes coming out of one side)too quiet at idle. Next was a Pacesetter that still was not great at idle and at full throttle. Last is the BORLA that took quite a bit of time to tune with the adjustable open hole spacers on the passenger side. It sounds good at idle and at full throttle. Now my engine only has bolt on performance, such as Edlebrock TES headers and gutted cats, but no way in hell can I get it to sound(as GREAT) like a STOCK LS1 with an aftermarket exhaust. When I was putting on the Edlebrock headers, before I welded them in, I fired up the car with the pipes open. It just sounded LOUD, but NOT in a racy way. A hot cam makes a HUGE difference in the way an exhaust system BARKS, but NO exhaust system is going to make a STOCK L98 or an LT1 sound like an LS1.

[V]

in one part they said 600 cars they built had it installed and the caption said 600hp cars... well, what was it

[69RSZ]

When I had the phase 1 package done my ss still had the stock LS1 cam and exhaust manifolds and cats from the factory and it still made a big difference and sounded really nice.They can also make it so you can use your center mount exhaust tips also.I wouldnt hesitate to buy one if I didnt have it.GMMG made over 600 cars AND 600HP 427 cars.

[91DropTop]

i think they should of put more cat back only cars in the video so the majority that will get it can hear hat it will sound like, not everyone is driving a cammed 427 with a full exhaust...i have slp long tubes, high flow cats and y pipe and a borla cat back, and love how it sounds.

[JL8Jeff]

I had the system on my 2000SS with stock manifolds and cats and it sounds good but nothing close to those cars in the video. It really needs high flow cats at a minimum to open up the sound. I just couldn't justify the cost so I sold the setup. But for a stainless exhaust it's definitely worth it compared to the other stainless setups.

[SteveR]

Somewhere there used to be clips of the stock Blackbirds with the GMMG exhaust on them on the site. Not sure if they're still there, I havent checked in a while.

[ar0ck]

I would take one in a heartbeat if I could afford it.

[BonzoHansen]

Ron, you bringing any of those badass rides out Sunday?!?!?

[DaSkinnyGuy]

in one part they said 600 cars they built had it installed and the caption said 600hp cars... well, what was it

they mean 600hp cars. Gmmg didnt make more than 100 total cars or something like that. They are saying 600hp to show you that this is a catback that can handle 600hp and you dont have to do a true dual setup when you are making that kind of power.

[sweetbmxrider]

I would take one in a heartbeat if I could afford it.

same :nod:

[edpontiac91]

What is the difference between the sound of the SLP Loudmouth and this system? They both seem to be chambered pipes without a muffler!

[69RSZ]

Ron, you bringing any of those badass rides out Sunday?!?!?
I wish I could but I have lots of things around the house and yard that I have neglected lately and I work 7 days a week 11-7 AM so im pretty much beat.I think your talking about the fbody nats?I have to skip this years event.:(

[69RSZ]

they mean 600hp cars. Gmmg didnt make more than 100 total cars or something like that.

GMMG made all the berger SS camaros for three years totaling over 100,all the Earnhardt intimidator cars,all the hot rod magazine cars,all the blackbird WS6 cars,all the 02 ZL1 cars,all the 35th anniversary performance edition cars,all the Dick Harrel cars,all the Tom Henry cars for Tom Henry chevrolet.Im sure all the cars total over 600 cars.Also cars modified for private owners that were not included in the limited edition programs.

[SteveR]

What is the difference between the sound of the SLP Loudmouth and this system? They both seem to be chambered pipes without a muffler!

The loudmouth is very raspy and tinny. It's a lot more high pitched than the GMMG. The GMMG is i bit more throaty and aggressive without being overly loud.

[Rich189]

I have a very similar setup from stainless works on my ws6 and love it... for my third gen im going to be making Lt's into a custom x pipe with 2 chambered mufflers and dump it before the rear. So we will see how that turns out.

[Tru2Chevy]

What is the difference between the sound of the SLP Loudmouth and this system? They both seem to be chambered pipes without a muffler!

The GMMG uses an actual chambered pipe setup (similar to the setup that was available on some 1st gen cars) and the LM is just straight pipe with a resonator in line. Not a huge difference, but the sound is definitely different.

- Justin

[TNTramair]

GMMG is allways music to my ears:
here are a couple vids where you can hear it at WOT on spray....this is cam only through long tubes and no cats.
http://www.youtube.com/watch?v=v2gbT06aj4Q

when ya watch this vid...just wait for it....
http://www.youtube.com/watch?v=YDw5MvKjhEg

ill post some new vids of what it sounds like with a 402 and twin turbos....im loading them tonite and ill post up tommorrow.

[edpontiac91]

Does ANYONE have a sound vid of a 3rd Gen with a STOCK 350. Seems like everybody has one of an LS1 with a WILD CAM, 4 Turbos, no Cats etc. They are going to sound AWESOME with those mods.

[DaSkinnyGuy]

TNTramair im the same guy who posted a comment on your video awhile back. Could you make another video. :mrgreen:

[Tru2Chevy]

http://www.youtube.com/watch?v=05ZG0kacKek

GMMG on an '88 IROC with Edelbrock TES headers and no cat. Stock 350 TPI motor.

- Justin

[TNTramair]

TNTramair im the same guy who posted a comment on your video awhile back. Could you make another video. :mrgreen:

thanx...i made a couple more last night cause i just got the new set up tuned so i was out cruisin. ill post up later on tonight.

[bcgetfresh]

wow that exhaust sounds great....

[426 Wedge]

Sounds tempting! I wonder what their return policy is if I dont like the way it sounds?? The sales video does sound cool!

[DaSkinnyGuy]

Sounds tempting! I wonder what their return policy is if I dont like the way it sounds?? The sales video does sound cool!

if you dont like the way a gmmg sounds then you need to sell your car and move into the import crowd. Theres no need to worry about returning it and if you dont like it put it up online and sell it and it will be gone within a week. Im getting mine soon.

[Fast92RS]

I like that system and the way it sounds but the system is only 2 1/2". I already have a full 3" exhaust on the car now. So im on the fence about it. Stainless Works make a chambered exhaust for F-body's in full 3" but they only make it for 93 - 02 F-body's even though the third gens exhaust is just about the same I would have to change the hanger brakects to make it work and for over a $900 price tag Id probaly be better off going to mufflex and getting a complete system made up. I know they say the GMMG exhaust can handle alot of power but the guy's at mufflex seem to disagree on what diameter tubing is best for my engine set up.

[426 Wedge]

if you dont like the way a gmmg sounds then you need to sell your car and move into the import crowd. Theres no need to worry about returning it and if you dont like it put it up online and sell it and it will be gone within a week. Im getting mine soon.

I don't know about selling my car just yet. It would be real nice if the sales vid had a 350 with headers running their chambers.

[DaSkinnyGuy]

I like that system and the way it sounds but the system is only 2 1/2". I already have a full 3" exhaust on the car now. So im on the fence about it. Stainless Works make a chambered exhaust for F-body's in full 3" but they only make it for 93 - 02 F-body's even though the third gens exhaust is just about the same I would have to change the hanger brakects to make it work and for over a $900 price tag Id probaly be better off going to mufflex and getting a complete system made up. I know they say the GMMG exhaust can handle alot of power but the guy's at mufflex seem to disagree on what diameter tubing is best for my engine set up.

Think of it this way the intermediate pipe is 3 inch and it splits into two 2 1/2inch pipes thats basically is equal to one 5 inch pipe. its been shown on a dyno that this ctback made 1hp less than a true dual set up. Dont let the two 2 1/2 inch tailpipes fool you. They get the job done. If they were 3 inch it wouldnt make to much of a difference. maybe 1 hp and 1hp is not gonna make you win a race.

[426 Wedge]

if you dont like the way a gmmg sounds then you need to sell your car and move into the import crowd. Theres no need to worry about returning it and if you dont like it put it up online and sell it and it will be gone within a week. Im getting mine soon.


I don't mind spending money on my car but I don't want to make a $1000.00 mistake either.

[DaSkinnyGuy]

I don't mind spending money on my car but I don't want to make a $1000.00 mistake either.

how is it a $1,000 mistake. Just buy the one with the basic tips for $772 shipped through pay pal.

[Tru2Chevy]

I don't know about selling my car just yet. It would be real nice if the sales vid had a 350 with headers running their chambers.

Read the rest of the thread....earlier I posted a link to just what you are asking for...


Think of it this way the intermediate pipe is 3 inch and it splits into two 2 1/2inch pipes thats basically is equal to one 5 inch pipe.

2 2.5" pipes have no where near the cross-sectional area of a single 5" pipe.

5" pipe area = 19.635"

2 x 2.5" pipe area = 9.817"

2 x 3" pipe area = 14.137"

- Justin

[DaSkinnyGuy]

For those interested i am trying to set up a group purchase for the gmmg catback. click link and if your a member post that you would like this.


http://www.ls1tech.com/forums/showthread.php?t=972696



2 2.5" pipes have no where near the cross-sectional area of a single 5" pipe.

5" pipe area = 19.635"

2 x 2.5" pipe area = 9.817"

2 x 3" pipe area = 14.137"

- Justin

Mathematics is my weakness