Thread: Finally bit the bullet and added the AA Cat-Less X-Pipe to my AA Exhaust
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      04-13-2010, 09:45 AM   #22
M3 Montreal
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Drives: 2012 M3 SG ,DCT & 2011 S4
Join Date: Oct 2008
Location: Montreal , Canada

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Originally Posted by mfeltiii View Post
Has anyone with AW and a catless set-up NOT had their bumper turn yellow?
Mine turns yellow also but the brush free jet wash at my local garage (esse here in montreal) removes that. It takes a while to build up.
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2012 E92-M3 Space Grey on Fox Red, DCT

2011 B8 S4 S-Tronic , Black on magma red
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