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      02-21-2010, 09:38 PM   #28
SOCAL
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Drives: E92 M3
Join Date: Oct 2009
Location: San Diego

Posts: 182
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Quote:
Originally Posted by Definitive View Post
Does anyone know the diameter of the exhaust pipes? The bent area you are talking about. I plan to install cutouts. Just doing my research now and looking at pricing of the race ready kits.

D
The OEM system is roughly 2.5" OD throughout but it changes shapes a few times.

See here... http://www.m3post.com/forums/showthread.php?t=352503

I replaced the kinked sections with mandrel bent tubing and addressed the heatshield issue with high tec header wrap, now you can literally put your hand on the exhaust tube after the car was driven for an hour, no joke!!! Waaaaaaay better than stock.
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