Clutch Masters twin plate systems are pure racing technology that also works well in high performance street applications. They are designed to hold tremendous horsepower and torque ratings, while retaining a very smooth operation. By using a smaller diameter clutch assembly, Clutch Masters twin plates significantly increase clamping values. The cover assembly is machined from billet aluminum and stronger than cast units. They are available in three specific pressure ratings as well as several types of friction surfaces. They flywheel is machined from Billet 6061-T6 aluminum to meet SFI spec 1.2 for competition in NHRA, NDRA, IDRC, IHRA, SCCA and NASA. Each flywheel includes a replaceable heat shield. 300-600% More Holding Power Than Stock Positive Release For Ease of High RPM Staging, and Shifting. Average Weight of Entire Assembly is Approximately 16 LBS, Averaging Well Over 50% Lighter Than OEM. Replaceable High Carbon Steel Friction Surfaces and Ring Gear Friction Disc Constructed of Bonded Organic and Kevlar Mix Installation: Direct replacement. Installation is performed exactly like the installation of a stock clutch. Includes Release Bearing, Pilot Bearing, and Pressure Plate Bolts