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      05-11-2013, 07:12 PM   #15
raziel5201314
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Drives: 2008 E92 M3
Join Date: Jan 2012
Location: Santa Barbara, CA

iTrader: (1)

test pioe and x pipe

hi , im looking to get a test pipe to get more hourspowers for me e92 m3 , but im confused with test pipe and x pipe. can you explain the differences for me? which ones should I get? which ones is more popular? if i want to get a test pipe, should I put my stock exhaust back?