High-performance Hawk DTC-70 Race Rear Brake Pads (HB621U.638) designed specifically for competitive circuit racing and heavy-duty track use. The DTC-70 compound offers extremely high torque and a highly aggressive initial bite with superior release and control characteristics. It is engineered for vehicles with high deceleration rates. This set includes a full axle kit of high-friction pads. Parts included: 4 x Rear Brake Pads (Art. HB621U.638). Operating Temp Range: 400-1600°F (204-871°C). Optimal Temp Range: 800-1200°F (427-649°C). Note: For track use only, not recommended for street use due to high noise and dust levels.