This Girodisc rotor is a direct replacement for the OE disc.No modifications are necessary. The disc will bolt directly to your OE rotor hat and work with OE hardware, calipers and pads perfectly. The disc is made from cast iron, constructed in the USA and is made to the same specification and material as used by professional racing organizations. It is a curved vane design, developed in racing to act as a centrifugal pump to force cooling air through the disc.
*** Price is for a PAIR of rings and 2 hardware kits. ***
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