What is cost of parts? I got the RT hi-flow cats from Performance Nissan in Duarte, Calif. for $500, and they installed them for pretty cheap (don't remember labor cost exactly). Do you think test pipes with resonators will be better than the RT cats? I believe RT has a CARB certification number and they are 50 state legal.
DISCLAIMER: I am not providing legal advice. Anyone who buys this product thinking it is 50 state legal just because I say I believe that it is, he must be on the crack pipe. LOL. I am judgment proof. LMAO