Brand: Advanced Clutch Technology Manufacturer's Part Number: MB8-HDSS Part Type: Clutch Kits Product Line: ACT Heavy-Duty Clutch Kits Automotive Fittings Part Number: ACL-MB8-HDSS UPC: 00842385003609 Clutch Usage: Performance Clutch Disc Quantity: 1 Flywheel Included: No Input Spline Quantity: 20 Input Shaft Diameter: 0.875 in. Disc Diameter (in.): 8.425 in. Disc Diameter (mm): 214mm Disc Material: Organic Disc Style: Full face Hub Style: Sprung Pressure Plate Style: Diaphragm Throwout Bearing Included: No Alignment Tool Included: Yes Pilot Bushing Included: No 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.