These GiroDisc front rotors are a direct replacement for the OE disc
however a different brake pad with an annulus (pad swept area) of 66mm or less must be
used. This is done to keep the rotor weight at a reasonable level. The
necessary pad shape for the McLaren 600LT & 720S is a
custom pad shape, for the 765LT you will need pad shape
FMSI 1405.