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      02-02-2013, 09:12 PM   #6
SROC5
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Drives: E92 M3
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Quote:
Originally Posted by LarThaL View Post
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
I see your point.
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