Thread: E82 1M Exhaust system database
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      12-23-2011, 09:35 AM   #33
Ryan@IND
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Quote:
Originally Posted by S54 View Post
Has anyone measured the piping diameter of the various systems yet?
Rear muffler to center muffler pipe

OD - 77mm
ID - 75mm

Center Muffler to down pipe flange

OD - 64mm
ID - 61mm
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