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tre · 06-08-2006, 12:54 PM

Are we talking 3inch cat back? because doing a 3inch cat back probably would be fine because you still have restrictive piping.

I'm runing a 4 into 1 header straight to 2.5inch piping with no cat. back to a non restricting muffler.

Now 4 into 1 header wtih 3inch back from there would probably not be so smart. I dont think the race guys even use 3inch.

06-08-2006, 12:54 PM	#15
tre Zilvia Junkie Join Date: Apr 2006 Location: Seattle, WA Posts: 544 Trader Rating: (0)	Are we talking 3inch cat back? because doing a 3inch cat back probably would be fine because you still have restrictive piping. I'm runing a 4 into 1 header straight to 2.5inch piping with no cat. back to a non restricting muffler. Now 4 into 1 header wtih 3inch back from there would probably not be so smart. I dont think the race guys even use 3inch. __________________ I didn't buy an Audi because it is a Great Car, but for more of a reason to be an asshole.