exhaust questions
Thread Starter
Racer
Joined: Apr 2005
Posts: 397
Likes: 0
From: San Jose CA
exhaust questions
How much hp do people actually gain with exhaust? I was looking under the car trying to decide what to do and it looked like the stock piping was pretty decent size. Is there any performance gain from a catback or is it purely sound? what gain do people notice running catless vs not? What is the most gain that can be made on a NA motor with longtubes, offroad x, and catback?
thanks
Ben
thanks
Ben
Race Director
Joined: Sep 2004
Posts: 17,786
Likes: 4
From: Redsox, Pats, Celts & Bruins !!! Redsox Nation !!!
St. Jude Donor '06-'07-'08-'09-'10-'11-'12
Depends on how you define "exhaust"
Headers back
Cats back
After H pipe back
Muffler Only
The "advertised" HP is FOS IMHO
Headers back
Cats back
After H pipe back
Muffler Only
The "advertised" HP is FOS IMHO
Melting Slicks
Joined: Nov 2004
Posts: 3,076
Likes: 0
From: Machine Silver Z06 The Golden State......... Bay Area
St. Jude Donor '05
If you're speaking strickly about the catback the performance gain is minimal but the sound should improve greatly depending on which one you go with. An X-pipe will help it flow better, again performance gain is minimal. Now when you add a set of LT Headers you can get some real gains there. Someone with better knowledge on this will chime in. 
Safety Car
Joined: Nov 2003
Posts: 4,979
Likes: 5
From: San Diego, CA "leaf" "tee" "e"
By the time you get that far back, it doesn't really matter anymore. If you had ceramic coated header and x-pipe, then there'd probably be enough heat and velocity left in the system for the catback to make a difference tho.
