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      01-18-2012, 07:04 AM   #10
Lieutenant Colonel
Drives: 08 E90 M3, 99 E36 M3 Turbo
Join Date: Feb 2011
Location: Concord, NH

Posts: 1,620
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Why is the front of the challenge x-pipe all messed up? Looks like someone bought a street pipe and then crudely added a cat bypass section. I don't see proper flanges. Just a slightly flared piece of regular exhaust pipe to fit the header gasket. Does it leak badly when installed
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