ACT Performance Street Clutch Discs are designed for smooth engagement, quiet operation, and improved durability. This Performance Organic Street style disc uses a premium organic friction material for high heat tolerance, quick recovery, good friction, and long life. The linings are backed with steel for extremely high burst strength, and the center section resists failure even under harsh conditions. The spring center construction properly dampens torsional vibrations for quieter operation. Modified for quicker shifting, this disc is certified SFI Spec. 1.1.