GMPP Exhaust Reviews - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

chevyridinghigh · 08-09-2009, 11:00 AM

Just wanted some reviews on the GMPP exhaust. I am thinking about going for the higher sound, hoping it's not too loud. Did you go for the lower or higher sounding one? Thanks.

CamaroScotty · 08-09-2009, 11:49 AM

We just installed the offroad GMPP on a customer car....I find it better sounding than stock, and FAR from obnoxious sounding. This is what I'd roll!

Had another customer stop Saturday to look at it - he liked it too, and found it hard to believe it was the "off road" version. What he DID like, is you won't see those big pan mufflers that come on the car from the factory any more.

Again, Dave in our parts have them ready to ship out at a camaro5 discount.

chevyridinghigh · 08-09-2009, 12:57 PM

Quote:

Originally Posted by CamaroScotty

We just installed the offroad GMPP on a customer car....I find it better sounding than stock, and FAR from obnoxious sounding. This is what I'd roll!

Had another customer stop Saturday to look at it - he liked it too, and found it hard to believe it was the "off road" version. What he DID like, is you can see those big pan mufflers that come on the car from the factory.

Again, Dave in our parts have them ready to ship out at a camaro5 discount.

I thought the jerry can mufflers would be taken out with axleback exhausts? Is that not the case?

SGOS252382 · 08-09-2009, 01:31 PM

Quote:

Originally Posted by chevyridinghigh

I thought the jerry can mufflers would be taken out with axleback exhausts? Is that not the case?

That was a typo. He ment to say it gets rid of those big ulgy cans. The tips are also 4.5'' on the GMMP exhausts.
Pics of GMPP "off road" version.

http://www.camaro5.com/forums/showthread.php?t=34754

Van · 08-09-2009, 01:45 PM

Soooo then all the GMPP exhausts are axle-back and provide no power gains whatsoever?

SGOS252382 · 08-09-2009, 01:51 PM

Quote:

Originally Posted by Van

Soooo then all the GMPP exhausts are axle-back and provide no power gains whatsoever?

They should make a few HP, especially on the L99 A6. The L99 A6 uses a different muffer than the LS3's. They looks the same on the outside but when you cut them open, they're very different.
The LS3 mufflers are a straight through design with some packing material. The L99 mufflers are all crazy looking on the inside with more packing material.

My GMPP "off road" axle back has a 100% staight through design. Its a straight shot in and out the other side. So it should be worth a few HP. Its also much lighter than the stock mufflers.

Van · 08-09-2009, 01:53 PM

Hmm...so it's GMPP axle back for $900, or aftermarket cat-back for $1100--give or take.

SGOS252382 · 08-09-2009, 01:58 PM

Quote:

Originally Posted by Van

Hmm...so it's GMPP axle back for $900, or aftermarket cat-back for $1100--give or take.

You might call around and find it cheaper. I got mine (gmpartsdirect) for $724 total. I believe it was $661 before shipping and handling.
But the last I checked they had raised the price a bit.

jpsuperman81 · 08-09-2009, 02:12 PM

Quote:

Originally Posted by Van

Hmm...so it's GMPP axle back for $900, or aftermarket cat-back for $1100--give or take.

Borla axle back can be had for 600 shipped And is basically the same, borla makes the gmpp setups too. GMPP stuff is usually just like aftermarket but marked up so you can call it GMPP.

SGOS252382 · 08-09-2009, 03:31 PM

Quote:

Originally Posted by jpsuperman81

Borla axle back can be had for 600 shipped And is basically the same, borla makes the gmpp setups too. GMPP stuff is usually just like aftermarket but marked up so you can call it GMPP.

From what I've seen and heard, (GMPP "off road") and (Borla -mufflered) are the pretty much the same. The only real difference is the tips. With the GMPP you get a different design and shape with the tips, plus the bowtie emblems on the tips.

H3LLJumper · 08-09-2009, 05:26 PM

They sound better than stock. That's for sure. I still didn't think they were very loud. Mufflers gone= best part. GMPP Exhaust+NOWEEDS!

drtwo · 08-09-2009, 09:53 PM

SCOTTY what would the GMPP axle back cost?

bobby35ny · 08-09-2009, 09:59 PM

I have the STREET version on the gmpp axle backs sitting in the box. It's ALMOST a straight thru path, VERY small curve in the can. Looks to like the only difference between off road and street is that the street has more packing. No crazy baffles or anything like that.

-bobby

Van · 08-09-2009, 10:01 PM

Well...I don't think I would spend 6-700 dollars just for sound is the thing. I may end up just staying stock and working on cosmetics first until I get around to feeling okay with an intake/full exhaust/tune.

So I guess I'll do the tint, painted stripes, and then perhaps look at suspension upgrades since those don't affect the drivetrain warranty.

08-09-2009, 11:00 AM	#1
chevyridinghigh The Bowtie Is Back Drives: 2010 Silver Camaro SS/RS -Blk Int. Join Date: May 2009 Location: Westchester County, NY Posts: 655	GMPP Exhaust Reviews Just wanted some reviews on the GMPP exhaust. I am thinking about going for the higher sound, hoping it's not too loud. Did you go for the lower or higher sounding one? Thanks. __________________ 2SS RS SIM M6 with Polish Silver wheels

08-09-2009, 11:49 AM	#2
CamaroScotty Account Suspended Drives: Your new SLP Camaro! Join Date: Jul 2008 Location: Cedarburg, WI Posts: 6,801	We just installed the offroad GMPP on a customer car....I find it better sounding than stock, and FAR from obnoxious sounding. This is what I'd roll! Had another customer stop Saturday to look at it - he liked it too, and found it hard to believe it was the "off road" version. What he DID like, is you won't see those big pan mufflers that come on the car from the factory any more. Again, Dave in our parts have them ready to ship out at a camaro5 discount. Last edited by CamaroScotty; 08-09-2009 at 02:04 PM.

08-09-2009, 01:45 PM	#5
Van Drives: 2006 EVO MR - 390 @ wheels Join Date: Jul 2009 Location: San Antonio Posts: 384	Soooo then all the GMPP exhausts are axle-back and provide no power gains whatsoever? __________________ 2010 2SS/RS 6spd manual -- Victory Red / Black Leather 1100, Preliminary order accepted 7/27/09 2000, Order accepted by GM 8/13/09 3000, Order accepted by production control 8/18/2009 TPW 9/07/2009 3300, Order scheduled for production 8/24/2009 3400, Order broadcast 9/1/2009 3800, Order produced 9/11/2009 4200, Shipped 9/11/2009 5000, Delivered to the dealer

08-09-2009, 01:53 PM	#7
Van Drives: 2006 EVO MR - 390 @ wheels Join Date: Jul 2009 Location: San Antonio Posts: 384	Hmm...so it's GMPP axle back for $900, or aftermarket cat-back for $1100--give or take. __________________ 2010 2SS/RS 6spd manual -- Victory Red / Black Leather 1100, Preliminary order accepted 7/27/09 2000, Order accepted by GM 8/13/09 3000, Order accepted by production control 8/18/2009 TPW 9/07/2009 3300, Order scheduled for production 8/24/2009 3400, Order broadcast 9/1/2009 3800, Order produced 9/11/2009 4200, Shipped 9/11/2009 5000, Delivered to the dealer

08-09-2009, 09:53 PM	#12
drtwo Drives: 2SS RS Yellow, Raptor, Vrod Join Date: Jul 2009 Location: South Dakota Posts: 599 View My Garage	SCOTTY what would the GMPP axle back cost? __________________ 2SS RS Rally Yellow, LS3, M6, sunroof, extra on the fast!

08-09-2009, 05:26 PM	#11
H3LLJumper Drives: 2010 Camaro 2SS VIN#11184 Join Date: May 2009 Location: Irvine, California Posts: 580	They sound better than stock. That's for sure. I still didn't think they were very loud. Mufflers gone= best part. GMPP Exhaust+NOWEEDS!

08-09-2009, 09:59 PM	#13
bobby35ny Drives: 18 ZL1 A10 Join Date: Nov 2008 Location: South East, FL Posts: 3,024	I have the STREET version on the gmpp axle backs sitting in the box. It's ALMOST a straight thru path, VERY small curve in the can. Looks to like the only difference between off road and street is that the street has more packing. No crazy baffles or anything like that. -bobby __________________ 2017 ZL1 M6 Bog City, 2013 ZL1 M6, 2010 2SS M6 ZL1::J-E-T-S JETS JETS JETS

08-09-2009, 10:01 PM	#14
Van Drives: 2006 EVO MR - 390 @ wheels Join Date: Jul 2009 Location: San Antonio Posts: 384	Well...I don't think I would spend 6-700 dollars just for sound is the thing. I may end up just staying stock and working on cosmetics first until I get around to feeling okay with an intake/full exhaust/tune. So I guess I'll do the tint, painted stripes, and then perhaps look at suspension upgrades since those don't affect the drivetrain warranty. __________________ 2010 2SS/RS 6spd manual -- Victory Red / Black Leather 1100, Preliminary order accepted 7/27/09 2000, Order accepted by GM 8/13/09 3000, Order accepted by production control 8/18/2009 TPW 9/07/2009 3300, Order scheduled for production 8/24/2009 3400, Order broadcast 9/1/2009 3800, Order produced 9/11/2009 4200, Shipped 9/11/2009 5000, Delivered to the dealer

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