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According to Real OEM for F/R bar diameters in mm:
Z4 std: 24/18
Z4 sport: 25/19
Z4M: 27/22.5
H&R: 27/21 adjustable
Dinan: 25/22 adjustable
The upgraded bars for the non-M (H&R) are close to what comes oe on the M. The shown part numbers are for the non-M Z.
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Last edited by Incompatible; 12-23-2010 at 10:14 AM..
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