Hawk Performance has dominated Motorsports race tracks for more than 15 years, offering highly-engineered friction products for nearly every type of racing! *Blue-42 ('EE' Compound Code)* Intermediate initial bite, increased mid Mu characteristics, and low to mid-temperature range. *Blue-9012 ('E' Compound Code)* * Medium/High Torque and Temperature Compound * Excellent Brake Modulation * #1 Selling Brake Pad Material for SCCA. *Black ('M' Compound Code)* Medium torque and temperature compound designed to be a good, all-purpose low- cost racing brake pad. * Medium torque and temperature pad * Good cold effectiveness * A good all-purpose low-cost racing brake pad * Good for Dirt Modified and IMCA style pavement Modified * *Optimal Range:* 200 - 700 * *Min/Max Temp:* 100 - 900 * *Torque:* Medium *DR97 ('J' Compound Code)* Excellent static and dynamic coecient of friction. Smooth linear torque. Low pad and rotor wear. For use in drag racing. *MT 4 ('L' Compound Code)* Medium/High torque and temperature compound with medium/high initial bite. For circle track cars under 2800 lbs without high deceleration rates. * High initial bite * Designed for pavement circle track under 2800 lbs * Designed for applications not needing high deceleration rates * *Optimal Range:* 500 - 1000 * *Min/Max Temp:* 400 - 1200 * *Torque:* High *Metallic (MB Compound Code)* High torque with linear in-braking characteristics across temperature ranges, allowing the driver to brake harder, longer without sacrificing the life of the pad. *HT-10 (S Compound Code)* Intermediate to high torque with a smooth initial bite. Very consistent pedal feel. Excellent modulation and release characteristics. *Note:* Hawk Performance burnishes its HP Plus brake pads as a final step in the factory, but all brake pads have to be bedded-in with the rotors (new or used) that they will be used against. Properly bedding-in new brake pads results in a transfer film being generated at the pad and rotor interface to maximize brake performance.