Originally Posted by RPM90
I'm at the real oem link, but I'm not seeing the larger rotors listed as OEM.
They are listed as "if equipped".
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.