The GiroDisc 2-piece rotor system is a direct replacement for the OE
rotor, no modifications are necessary. The disc will bolt directly to
the car and work with OE calipers perfectly. Once the Girodisc system is
in place, simply replace the cast iron rotor ring when needed. The
average Girodisc 2-piece rotor is approx 2kg lighter per rotor then the
stock units. This reduction in rotational and unsprung weight allows for
quicker acceleration and suspension response.
