Thread: X Pipe for 550?
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      01-31-2012, 10:47 PM   #8
Jimefam
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Drives: 2011 550I Msport
Join Date: Jul 2010
Location: Cumming, Ga

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Quote:
Originally Posted by gray550 View Post
I thought the exhaust system had DP's with primary cats, then secondary cats followed by a resonator, followed by two mufflers?

I saw the Supersprint X pipe but that eliminates the resonator and I want to eliminate the two cats (or whatever they are) before the resonator but after the DP's. Might need a custom X pipe to achieve this as I can't find any existing ones.
This is correct. I had the AR design catless downpipes installed with the eisenmann race mufflers, loved the sound but it had a moderate drone between 1600-2000rpm. I removed the secondary cats and replaced them with the magnaflow X pipe muffler(12469 is the part # for the 3" but I used 2.5") and kept the stock resonator. Volume went up ever so slightly but drone is gone. It's perfect now.
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