The GiroDisc slotted front rotor for McLaren 620R is a vehicle-specific rotor noted to be incompatible with OE pads in the source description. Intended for the 620R front brake assembly, its slotted face aids pad cleaning and consistent brake feel, and the listing explicitly calls out that it will not work with original equipment pads, so pad selection should match the rotor specification.
GiroDisc McLaren 620R Slotted Front Rotors (Will Not Work w/OE Pads)