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      02-15-2012, 07:23 PM   #30
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Drives: 2013 C4S cab/2011 E90 M3
Join Date: Jun 2007
Location: Bay Area, CA

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Originally Posted by saeedg48 View Post
primary cat delete (aka test pipes) + akro cel delete or mild tune

Do not do it like this guy with crappy crush bent piping. The BMW parts are specially designed and hydroformed to allow for enough clearance without significantly narrowing, crush bends are significant restrictions. Hydroformed bends like the stock pipes are NOT crush bends.
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