I Just bought a thermal R&D classic exhaust for my 02 civic. I got the full cat back, it came with a resonator. 2 questions... should i leave the resonator on, or should i get rid of it... what will get me a more crisp, non ricy sound.. And should I hollow out my cat, with the ulev i hear it restricts a lot of horse..
Get back to me.... -Reed:thumbup: