I'm using a 3" exhaust from the turbo back with a 3" high flow cat. The type of fuel i'm using on the street here, is high enough, that it burnt the screen wiring that you will find on either end of the cat converter, straight off. You will find that no a turbocharged car, it's not the cat that keeps the noise down, but rather a baffle, or what i call a "hot dog" style resonator (i don't use one, and so my car is loud, even when on boost). Before the wire in the cat converter got burnt out, it still sounded the same, only a slight bit less polutive at the street lights. Now, it's a damn stinker, and i pray for the poor souls beside or behind me <img src=/images/forums/snitz/smile.gif width=15 height=15 border=0>
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