Brand:SPEC Clutch Manufacturer’s Part Number:SF672 Part Type:Clutch Kits Product Line:SPEC Stage 2 Clutch Kits Summit Racing Part Number:SXC-SF672 UPC:841802121667 Clutch Usage:Performance Clutch Disc Quantity:Single Input Spline Quantity:23 Input Shaft Diameter:1.031 in. Disc Diameter (in):10.250 in. Disc Diameter (mm):260mm Disc Material:KEVLAR® Disc Style:Full face Hub Style:Sprung Pressure Plate Style:Diaphragm Throwout Bearing Included:Yes Alignment Tool Included:Yes Pilot Bushing Included:Yes Flywheel Included:No Counterweight Assist:No Mounting Hardware Included:No Quantity:Sold as a kit.