Quote:
Originally Posted by Technic
I would like to know BMW reasoning in fitting the 135i with 6-piston front and 4-piston calipers in the rear standard in the USA when the M3 (as well as the M5 and M6) will continue to have 1-piston sliding calipers that each and every review so far complain about fading after heavy use...
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M5 has two pistons, not sure about the M6, but probably does as well.