GM Accessory Cat-Back Exhaust System
Thread Starter
3rd Gear
Joined: Jan 2007
Posts: 3
Likes: 0
GM Accessory Cat-Back Exhaust System
Anyone have experience with the GM cat-back exhaust system, the street legal one? Just trying to find out if there are problems with interior drone. Considering installing it on new 2007 C6 convertible. I know there are others from Corsa, Borla that may be a better value or more hp.
Marty
Marty
Le Mans Master
Joined: Sep 2004
Posts: 7,027
Likes: 6
From: Shiloh Ohio
Anyone have experience with the GM cat-back exhaust system, the street legal one? Just trying to find out if there are problems with interior drone. Considering installing it on new 2007 C6 convertible. I know there are others from Corsa, Borla that may be a better value or more hp.
Marty
Marty
Burning Brakes
Joined: Feb 2006
Posts: 903
Likes: 5
From: Miami FL
I have the gm touring system. My mods are vararam,spacer,ported tb, ported intake,cam,AR 1 7/8" LT's, 2.5" x-pipe,Gm touring exhaust. My car put down 435/397 and sounds really quiet. The lope is definately there, and the volume has increased but very subtle. At normal cruising speed in the city or on the highway, you wouldn't know it had a thing done to it. I get the slightest hint of drone from 1400-1700rpms. Hope that helps. No video for now.
dougie
dougie
Safety Car
Joined: Jan 2005
Posts: 4,510
Likes: 1,463
From: Pittsburgh PA
2025 C8 Stingray of the Year Finalist - Unmodified
2024 C8 of the Year Finalist - Unmodified
I have the system on my convertible. I'm happy with it. My Vette is 100% stock and it is slighty louder than the factory exhaust with a lower rumble at idle and a nice sound when accelerating. It has no drone that is noticeable to me and does not gurgle and pop when you let off the gas. I did not want a system that was loud or high pitched and ratty sounding. You should try and listen to one before you buy. That said, I believe the pricing on the Borla system is a little less than the same GM piece made by Borla. 
