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      06-06-2020, 09:02 AM   #4
brokeboi
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Drives: F90
Join Date: Feb 2020
Location: Norway

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Mine are 3". Some forum members has managed to fit Dinan 4" on a stock M550i. The M550i stock diffuser is cut slightly different compared to other G30 models.

This is how 4" will look like:
https://g30.bimmerpost.com/forums/sh....php?t=1624896
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