Jun 6, 2010 #1 J Jonathan Member Joined May 17, 2008 Messages 554 Reaction score 0 Points 16 I have a 99 Eclipse RS with Injen cold-air intake, exhaust headers, but stock RS exhaust. I'm in the process of boosting it, but I know I'll need to upgrade my exhaust system. Will Cat-back help my performance?
I have a 99 Eclipse RS with Injen cold-air intake, exhaust headers, but stock RS exhaust. I'm in the process of boosting it, but I know I'll need to upgrade my exhaust system. Will Cat-back help my performance?