Hawk Performance Blue 9012 Race Compound Rear Brake Pads (HB523E.539). Designed for competitive road racing and track days, the Blue 9012 compound offers medium to high initial bite and consistent brake torque across a wide temperature range (250°F - 1000°F). These pads are engineered for drivers seeking controllable brake modulation and excellent release characteristics. Included in the set: 1x Rear Axle Brake Pad Kit (Set of 4 pads), Part Number: HB523E.539. Warning: For track use only, not recommended for street use due to high dust and noise.