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Kcc · 11-17-2010, 01:22 PM

Does changing the midpipe to "high flow" cats on stock downpipe and axleback gets you any gains and sound? How much different would I be getting?

Kcc

11-17-2010, 01:22 PM	#98
Kcc First Lieutenant Drives: 4 Wheels with a turbo Join Date: Jul 2010 Location: Markham, Toronto Posts: 343 iTrader: (0)	Does changing the midpipe to "high flow" cats on stock downpipe and axleback gets you any gains and sound? How much different would I be getting? Kcc __________________ 135i - AW