Thread: OEM X-pipe Mod
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      01-30-2013, 12:59 PM   #3
pbonsalb
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Drives: 08 E90 M3, 99 E36 M3 Turbo
Join Date: Feb 2011
Location: Concord, NH

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Vishnu got 13 rwhp and 28 lbs rwtq from deleting the cats on a stock x-pipe, with no changes to the tune and no water/meth.

http://www.m3post.com/forums/showthr...hop+cat+delete

I think test pipes alone have been tested to show greater horsepower gains, but do not have links at hand to those dynos.