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      03-02-2012, 10:32 AM   #9
tha_good_life
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Drives: 2015 M4
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2010 BMW M3  [4.33]
Quote:
Originally Posted by Ssgohan434 View Post
Do the primary cats stay intact while the xpipe eliminates the secondary cats? (with this specific fabspeed xpipe model)? Or does this xpipe eliminate both set of cats?
Thnx.
Your primary stays and eliminates the secondary. I have the one without the resonator.