Thread: Anyone running the Rieger quad diffuser?
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      03-05-2018, 07:31 PM   #11
fredy
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Drives: 135i
Join Date: Sep 2010
Location: canada

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Originally Posted by OneWhite35 View Post
Does the existing exhaust need to be modified as well to fit the quad exit? Or does the existing exhaust fit right through the left opening?
No i just use the 1m exhaust (the oem).
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