The GiroDisc slotted rear rotor for McLaren 620R is supplied as a rear replacement for that McLaren application but will not work with OE pads. Its slotted surface helps channel gases and debris away from the pad contact area to support more consistent braking under repeated use. Note that this rotor requires non-OE rear pad compatibility as specified.
GiroDisc McLaren 620R Slotted Rear Rotors (Will Not Work w/OE Pads)