I've been researching, and am having trouble finding much dyno-proven catback info....I'm looking for more than speculation...
Does anyone have the facts....Vendors or end-users can you help me...I bet others are wondering too

I guess I'm looking for whp gains on a stock car adding Catback, with 02 sensor for EVO8....

 

I have AVO Turbo-back but there's a catback system as well. Both dynoed by Brainstorm Performance in LA and gained between 20 to 40 WHP. You can visit Brainstorm Web site at http://www.turboperformance.net, there's the dyno-sheet there.

 

Thanks - keep the numbers coming - once there are enough, I will consolidate them in one post for the "exhaust thread"...

 

I recall a thread a while back about Vivids Evo gaining 13 whp with a catback.

I guess the gains will vary car to car because of the difference in boost. Some people report a 2 psi gain and some say the boost drops.