I have a 2.5" stainless steel exhaust bent for a 5g prelude with a 2.5" magnaflow muffler. It has a hi flow cat, magnaflow resonator, and 2 holes for o2 sensors. It has a nice deep sound... not ricey.. i think thats due to the magnaflow muffler. I want to trade for a cat back system... greddy, apexi preferably... no ebay garbage. I live in ny... anything in the tristate area wud be great. email--> yankee81116@aol.com