Originally Posted by DerekS
That's because all 335i variants sold in Canada and the USA have the same size rotors. There are two exceptions to this:
1) with the M Sport option, Canadian buyers of F30-335i can order "M Sport brakes" @ extra cost of $350 = larger, lightweight rotors (370mm front and 345mm rear), Brembo blue M callipers and upgraded hubs,
2) for USA buyers of F30, the "M Performance brakes" are a port-installed option available @ extra cost of $2300-2700. These brakes are the same as M Sport brakes, except the rotors are drilled and slotted and the callipers are painted in red or yellow.
For the US, that is exactly what I was saying.
"M sport/performance" is an OPTION, but not the OEM standard that is put on US Msports.
Thanks for adding to the forums information.