heya ppl i just fitted a straight thru powerflow exhast, has anyone else got this done??? would like to know about their opinion on it, i think it`s alrite i got the 3n a half inch jap style one with titanium tip...i was lookin under the car today and noticed that there is another small piece of piping and a tiny box between the cat and the exhaust...i thought the s thru exhuast was from the cat back... i am looking to fit a janspeed manifold and sports cat..would this take that section away when i get the manifold and s cat fitted?