Note: Rotor can only be made 48mm annulus in order to retain rear drum emergency brake, so you need to trim OE pad at the bottom (~5mm) to avoid overhang. This package includes a set of street pads (PD1368, same rear pad as Mitsubishi EVO X) that fits under 135i OE caliper w/o having to trim like OE. Furthermore this pad shape gives you even with more compound choice than 135i OE pads.Why we can't make the rear two piece rotor to fit OE pads?These two-piece rotors were engineered to be the best stock replacement
two-piece rotor on the performance market. This rotor is direct bolt-on, easy to
install, no additional hardware needed, and an excellent upgrade
for both street and track. They can deliver consistent brake torque under
extreme heat, session after session. When it comes to replacement - operating cost over the time will be lower than one-piece
RB rotors are made of harder iron than OE rotors. Our rotors are most compatible with semi-metallic brake pads. We do not recommend the use of ceramic brake pads, which may cause vibration.
Rotor Material: Racing Formula Alloyed Gray Iron & Heat treatedMachining: Open SlotSurface: EDP Coating w/cross cut grinding on friction surface
Click here to learn how RB two-piece rotors are built differently than the competition.
Two-Piece Feature Comparison Chart