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      07-16-2012, 12:47 PM   #1
Fen335i
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Drives: e92 M3 / X5d / Z4 M Roadster
Join Date: Jun 2008
Location: Pacific Northwest

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Diameter of oem xpipe

Does anyone know the diameter of the OEM xpipe, well to be exact the pipe diameter just past the primary cats where it butts up to the headers? Is that 2 1/2 inches?