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      03-13-2013, 01:54 PM   #4
RogeM3's Avatar
Drives: BMW E93 M3
Join Date: Feb 2012
Location: Asheville, NC

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Originally Posted by gatorfast View Post
I didnt have the fabspeed x-pipe but I had an exhaust shop cut out the secondary cats and replace with straight pipes (essentially the same as the fabspeed pipe).

Paired with my oem modded exhaust it produced a noticeable increase in volume but got very raspy. Had it like that for 6 months or so then got sick of the sound and recently welded in a pair of resonators to rid the rasp.
That's very interesting, I was thinking of doing the same, but I don't like rasp.... when exhaust shop cut out the secondary cats, did they also cut the resonators?
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