E90/E92 M3 Exhaust Systems Overview
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04-15-2009, 02:55 PM
4 * General
Drives: E92 M3 & 335,F10 535xi,Audi R8
Join Date: Dec 2007
so saying i would go with no cats at all which exhaust from the end of the headers all the way back will produce the most hp gains?
Nissan GT-R (Sold) When Driving Nice Whips It Helps To Have Nice Kix!
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