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      02-02-2013, 07:11 PM   #5
LarThaL
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Drives: 2011 M3
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Quote:
Originally Posted by SROC5 View Post
Doesn't the Challenge Street X-Pipe do that already?

http://challenge-usa.com/blog/produc...x-pipe-street/
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
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