L99 Convertible 3" Exhaust - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

xk49 · 09-15-2014, 02:49 PM

Can a three 3" diameter cat-back exhaust be installed on a 2011 2SS/RS auto without any modifications?

GONIF · 09-15-2014, 03:16 PM

Yes ,many brands make them ,Stainless Works , Borla, Magnaflow ,Corsa, MBRP, Flomaster, ECT.

xk49 · 09-15-2014, 03:53 PM

Quote:

Originally Posted by GONIF

Yes ,many brands make them ,Stainless Works , Borla, Magnaflow ,Corsa, MBRP, Flomaster, ECT.

I'm familiar with these brands, but I believe there is a specific fitment issue with the convertibles additional bracing as there are specific item numbers for convertibles and they are only for 2.5" piping.

GONIF · 09-15-2014, 03:56 PM

Seams to me ,if they make a ZL1 convert with Auto trans in 3 inch it shouldn't be a problem .

Apex Paul · 09-15-2014, 04:02 PM

Stainless Works makes a kit for the convertible for the clearance issue when using 3" on a convertible.

xk49 · 09-15-2014, 05:36 PM

Quote:

Originally Posted by Apex Paul

Stainless Works makes a kit for the convertible for the clearance issue when using 3" on a convertible.

Thanks for the info. I wonder if any 3" exhaust will work with their brace mod? Ya know, that brace looks like the stock brace with just spacers? If that's the case I could just make my own spacers.

Anyone else do their own brace mod and ran the 3" exhaust? Wouldn't want to be tied to Stainless Works only for the exhaust. Not that they are not any good, just want some options.

Iam Broke · 09-15-2014, 07:10 PM

Kook's system for their headers is 3" all the way down and one system fits all. Been looking at it myself lately.

2012LS3VERT · 09-15-2014, 07:41 PM

There are three clearance issues with the vert. 1)There is a forward tunnel brace. The stock one can be cut like the stainless works one, then add 1/4" spacers. 2) rear tunnel brace; add 1/4" spacers. 3) rear diagonal braces. Add 1/8" spacers in the center of the diagonal braces where they run through the subframe bushings, and 1/4" spacers at the very rear of the car. Most 3" exhausts have the same clearance issues in the vert. Finally, you can get the ARH brace they make, and it takes care of 1) and 2) at the same time. Then just the spacers on the rear diagonal braces.

I did 1,2,&3 on my vert. With 2 different 3" exhausts. Both had same clearance issues, Stainless works and borla. Ended up switching back to 2.5" NPP exhaust.

layzurguy · 09-15-2014, 08:42 PM

I have a KOOKS cat back right now. I did cut and drop the forward brace, but that's about it.

2012LS3VERT · 09-15-2014, 09:08 PM

Quote:

Originally Posted by xk49

Thanks for the info. I wonder if any 3" exhaust will work with their brace mod? Ya know, that brace looks like the stock brace with just spacers? If that's the case I could just make my own spacers.

Anyone else do their own brace mod and ran the 3" exhaust? Wouldn't want to be tied to Stainless Works only for the exhaust. Not that they are not any good, just want some options.

And the stainless works brace is modeled after the stock one, but is thicker to account for the cutout. I wasn't worried about it for the price they wanted, so I cut the stock one.

layzurguy · 09-15-2014, 09:33 PM

Quote:

Originally Posted by 2012LS3VERT

And the stainless works brace is modeled after the stock one, but is thicker to account for the cutout. I wasn't worried about it for the price they wanted, so I cut the stock one.

+1 no doubt

xk49 · 09-16-2014, 12:40 PM

I think I'm going to buy this for the forward tunnel brace:
http://shop.halosupercars.com/produc...2&categoryId=7

Only $89 and looks beefy with a decent drop. I'll make spacers myself for the other two braces.

2012LS3VERT · 09-16-2014, 01:50 PM

That's the rear brace.

christophe · 12-01-2014, 12:14 PM

Convert 2012 with ARH BRACE installed with QTP CutOut :

Envoyé de mon iPhone à l'aide de Tapatalk

09-15-2014, 02:49 PM	#1
xk49 Drives: 2011 2SS/RS L99 RJT Convertible Join Date: Sep 2014 Location: NH Posts: 306	L99 Convertible 3" Exhaust Can a three 3" diameter cat-back exhaust be installed on a 2011 2SS/RS auto without any modifications?

09-15-2014, 03:16 PM	#2
GONIF Drives: 73 VETTE ,, 05 2500hd diesel,14 1LE Join Date: Feb 2014 Location: The Left lane PHOENIX AZ Posts: 2,626	Yes ,many brands make them ,Stainless Works , Borla, Magnaflow ,Corsa, MBRP, Flomaster, ECT. __________________ OLD GUY FLYING FAST AND LOW

09-15-2014, 03:56 PM	#4
GONIF Drives: 73 VETTE ,, 05 2500hd diesel,14 1LE Join Date: Feb 2014 Location: The Left lane PHOENIX AZ Posts: 2,626	Seams to me ,if they make a ZL1 convert with Auto trans in 3 inch it shouldn't be a problem . __________________ OLD GUY FLYING FAST AND LOW

09-15-2014, 07:10 PM	#7
Iam Broke PHAT B33 Drives: 2012 TF3 Camaro 2SS/RS M6 Join Date: Jun 2012 Location: Dark of the Moon Posts: 1,460 View My Garage	Kook's system for their headers is 3" all the way down and one system fits all. Been looking at it myself lately. __________________ Another 1 of 371 '12 T3 LS3 M6's built.

09-15-2014, 08:42 PM	#9
layzurguy Ride On!!!! Drives: 2012 SS Ragtop Join Date: May 2012 Location: Race City USA Posts: 605 View My Garage	I have a KOOKS cat back right now. I did cut and drop the forward brace, but that's about it. __________________

09-15-2014, 04:02 PM	#5
Apex Paul Drives: Wagon Queen Family Truckster Join Date: Oct 2009 Location: Louisville, Ky Posts: 1,476	Stainless Works makes a kit for the convertible for the clearance issue when using 3" on a convertible.

09-15-2014, 07:41 PM	#8
2012LS3VERT Drives: 2012 2SSRS Vert, Black w/M6 Join Date: Jan 2013 Location: Montgomery, AL Posts: 1,265	There are three clearance issues with the vert. 1)There is a forward tunnel brace. The stock one can be cut like the stainless works one, then add 1/4" spacers. 2) rear tunnel brace; add 1/4" spacers. 3) rear diagonal braces. Add 1/8" spacers in the center of the diagonal braces where they run through the subframe bushings, and 1/4" spacers at the very rear of the car. Most 3" exhausts have the same clearance issues in the vert. Finally, you can get the ARH brace they make, and it takes care of 1) and 2) at the same time. Then just the spacers on the rear diagonal braces. I did 1,2,&3 on my vert. With 2 different 3" exhausts. Both had same clearance issues, Stainless works and borla. Ended up switching back to 2.5" NPP exhaust.

09-16-2014, 12:40 PM	#12
xk49 Drives: 2011 2SS/RS L99 RJT Convertible Join Date: Sep 2014 Location: NH Posts: 306	I think I'm going to buy this for the forward tunnel brace: http://shop.halosupercars.com/produc...2&categoryId=7 Only $89 and looks beefy with a decent drop. I'll make spacers myself for the other two braces. __________________ Flowmaster Force II Axle back, Kooks LT's and Highflow Cats, Oracle Side Makers, BC Coilovers, E-Force Supercharger, Rotofab Intake, HexVents, ACS T4 Splitter/Rockers/Wind Deflectors, Aeroforce dual pod, Autometer boost/WB analog gauges, MRR M228 20x10 20x11 Nitto Invo 275/315's, CDC Sport Bar, Tuned by Slowhawk Performance.

09-16-2014, 01:50 PM	#13
2012LS3VERT Drives: 2012 2SSRS Vert, Black w/M6 Join Date: Jan 2013 Location: Montgomery, AL Posts: 1,265	That's the rear brace.

12-01-2014, 12:14 PM	#14
christophe Drives: CAMARO CONVERTIBLE L99 2012 Join Date: Aug 2014 Location: FRANCE Posts: 66	Convert 2012 with ARH BRACE installed with QTP CutOut : Envoyé de mon iPhone à l'aide de Tapatalk