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      09-01-2009, 06:53 AM   #5
mixja
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Drives: 2011 E90 DCT Silverstone
Join Date: Jun 2008
Location: Beverly Hils, CA

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Quote:
Originally Posted by simonlam168 View Post
I have done second cats delete x pipe combined with 4 resonators yesterday. I add 2 x 14" magnaflow resonator to slightly cut the loudness and get rid of the drone.
So how close to stock does this sound? Is the OEM Primary Cat restrictive in its flow?