Carbotech XP8 is a high torque brake compound with a wide operating temperature range of 200°F-1250°F+ (93°C to 676°C+). Carbotech™ XP8™ is the first of our racing compounds. It provides good initial bite at race temperatures, high coefficient of friction, excellent modulation, and release characteristics. XP8™ offers extremely high fade resistance and is very rotor friendly. It's perfect for track day use with any tire.Operating range starts out at 200F and goes up to 1250F. Friction coefficient is rated at 0.56. We recommend this pad for track and aggressive street applications. Fit and Compatibility:Fits Porsche 911 Carrera 2 - 991 3.4L w/Iron Discs REAR factory calipers.