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      02-02-2013, 07:11 PM   #5

LarThaL's Avatar
Drives: 2011 M3
Join Date: Apr 2011
Location: West Springfield, MA

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Originally Posted by SROC5 View Post
Doesn't the Challenge Street X-Pipe do that already?
Stock mid pipe has secondary cats + a set of resonators. Challenge has no cats but only one set of resonators.

I was referring to simply cutting the stock secondary cats and welding resonators. This would give you a 4 resonator/no secondary cat set-up
Precision tool: 2011 BMW ///M3
Sledgehammer: 2014 Audi S6