Bimmerfest - BMW Forums - View Single Post - straight pipe... or not to straight pipe..???
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Old 05-11-2012, 10:20 AM
n0n0perational n0n0perational is offline
Alpine Addict
Location: Fresno, Ca
Join Date: Apr 2009
Posts: 10
Mein Auto: 99 M3, 91 325i
if im not mistaken the biggest difference comes with a tune...otherwise your not maximizing the new found increased flow from removing the cats
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