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      11-12-2012, 10:49 PM   #5
dd1981
Kapetan Svog Života
 
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Drives: 2012 335i sport
Join Date: Dec 2010
Location: Chicago

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Quote:
Originally Posted by justinnum1 View Post
did you do the mod to keep the flap open? did you notice a difference after doing it?
Yes I did the mod before I even bolted up the exhaust. I cant say what kind of difference it made because I never had the exhaust on the car while the valve was operationa. However I can say that I did the valve mod on my stock exhaust and it made it a little deeper. Not much but you will tell a slight difference.

Here check out my DIY.

http://www.f30post.com/forums/showthread.php?t=768703
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