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      07-27-2012, 10:11 AM   #19
nobrakese28
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Drives: Z4M Coupe
Join Date: May 2012
Location: Los Angeles

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So here is some good info about the Z4M and E46 Section 1.

They are very similar:

1) Obviously, they have the same interface at header.
2) The E46 M3 section one is about 3 inches shorter than the Z4M section 1.
3) The flanges are the same, but the clocking is different, not 180 off either.
4) The "s" bend is close or the same.
5) I am not certain if the elevation of the center of each pipe is the same inlet vs outlet, the Z4M section has an obvious elevation difference.









Threw a picture of the 1973 RD350 in because it is for sale
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