Thread: dinan+ ar20
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Old 01-31-2013, 12:45 PM   #14
n3985
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Join Date: Apr 2004
Location: Edgewater, NJ
Posts: 426
My Ride: E92 soon?
Actually the 20 fits perfectly because the OEM piping is more or less 2.0". The 2.5" can easily fit over the OEM piping but then the gap must be filled with weld, which could lead to leaks in future.
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