This special rotor is designed for the 02-07 WRX that has been retrofitted with STi rear calipers. The outside the diameter of the WRX STi rotor. The inside is the diameter of the WRX parking brake mechanism. Note that if you have a 2002-05 WRX, you will also need a hardware kit to bolt up the rear STi calipers; find that whole kit (including these rtors) HERE. These rotors will NOT fit the WRX STi. They will also NOT fit the WRX unless the car is using the STi Brembo rear calipers. Set of two brake rotors.

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