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      09-13-2007, 05:54 PM   #16
335i=:)
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Drives: 335i sedan-blk/blk-Poplar
Join Date: Oct 2006
Location: utah

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I bet aftermarket pipes will be 3.5, 3 at the smallest. The DP's are 3" where they connect to mid-pipe/catback, you won't to go any smaller then 3" or you'll cause a bottlenect. Anyone thinking about increasing boost with a chip or bigger turbo's should go 3.5.
Appreciate 0