Originally Posted by 97civicEXVTEC
i have a greddy evo2 cat back on now.. im not sure what the piping diameter is 2.25 or 2.5
2.5 i believe.
Exhaust is really importent because on my set up ive got the stock cat and 2in exaust on it and its definently hurting spool time. I plan on talking to kteller and picking up a 3in exhaust