Wilwood's GP320 Sprint Right Rear Brake kit offers increased braking torque and thermal performance of the GP320 4 piston calipers. A definitive increase in braking and durability over traditional aluminum rotor systems. Kit includes 10.50 x 0.19" Super Alloy steel rotor, Composition Metallic brake pads, lightweight aluminum dynamic mount splined rotor adapter and T-nut hardware kit.