I just had the Revolution S2 muffler from ACAutotechnic installed on my Celica.. ACAutotechnic.com
It's the last muffler on the page..
With a custom installation it was about $160 total.. I love the loud deep throaty sound my car now has! I was just wondering if anyone has ever heard about it.. Is it good/bad? Also, the ad claimed a 10-15hp gain depending on your engine.. True or no? Thanks for your help..