The SPEC Clutch Billet Aluminum Flywheel - SP90A is a high-performance flywheel designed for use in manual transmission vehicles. It is made from lightweight and durable billet aluminum, which helps to reduce rotational mass and improve engine response. The flywheel is precision-balanced to ensure smooth operation and features a replaceable steel friction surface for maximum durability. It is compatible with a wide range of aftermarket clutches and is ideal for high-horsepower and high-torque applications. This flywheel is a direct replacement for the factory flywheel and is perfect for track, street, and drag racing.