The SPEC Clutch Steel Flywheels SB53S-3 is a high-performance flywheel designed for use in manual transmission vehicles. It is made from high-quality steel and has been precision-balanced to ensure smooth operation and improved engine response. The flywheel is designed to reduce rotational mass, which results in quicker revs and improved acceleration. It also features a replaceable steel friction surface, allowing for easy maintenance and extended durability. The SPEC Clutch Steel Flywheels SB53S-3 is compatible with a wide range of vehicles and is an ideal upgrade for those seeking improved performance and reliability.