Brand: Advanced Clutch Technology Manufacturer's Part Number: SZ1-HDMM Part Type: Clutch Kits Product Line: ACT Heavy-Duty Clutch Kits Automotive Fittings Part Number: ACL-SZ1-HDMM UPC: 00842385010546 Clutch Usage: Performance Clutch Disc Quantity: 1 Flywheel Included: No Input Spline Quantity: 18 Input Shaft Diameter: 0.750 in. Disc Diameter (in.): 7.250 in. Disc Diameter (mm): 184mm Disc Material: Organic Disc Style: Full face Hub Style: Sprung Pressure Plate Style: Diaphragm Throwout Bearing Included: Yes Alignment Tool Included: Yes Pilot Bushing Included: Yes Pilot Bushing Material: Steel roller bearing Counterweight Assist: No Mounting Hardware Included: No Quantity: Sold as a kit. Description: ACT heavy-duty clutch kits offer a clamp load increase of 20 to 50 percent over OEM, significantly increasing torque capacity. The pedal feel with these clutches varies from stock to a moderate increase. Available for street and race applications, many are SFI-certified to ensure safety.