A1-145SL - GiroDisc 2-Piece Rotor Assembly, Left

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 is FMSI 1405 which are very common and found on the Nissan GT-R, Cadillac CTS-V and most AMG Mercedes equipped with 6 piston calipers.