Quote:
Originally Posted by exo-shell
All aftermarket springs will have a different part number for the M3 vs the M4 except the Macht Schnell kit; they come with a spring spacer for the rear springs.
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I'm thinking of purchasing H&R supersports that came off an M4, would they not be compatible with my M3? Or is it merely a difference in part #?
http://www.hrsprings.com/application...ts/4/1683/2015
http://www.hrsprings.com/application...ts/4/1686/2015
Looks like the part# is identical for the super sports, but different for the sports.