Brand: Advanced Clutch Technology Manufacturer's Part Number: AA1-HDSD Part Type: Clutch Kits Product Line: ACT Heavy-Duty Clutch Kits Automotive Fittings Part Number: ACL-AA1-HDSD UPC: 00842385022853 Clutch Usage: Performance Clutch Disc Quantity: 1 Flywheel Included: No Input Spline Quantity: 23 Input Shaft Diameter: 0.937 in. Disc Diameter (in.): 9.000 in. Disc Diameter (mm): 229mm Disc Material: Metallic/Organic Disc Style: Full face Hub Style: Solid Pressure Plate Style: Diaphragm Throwout Bearing Included: Yes Throwout Bearing Style: Flat face Alignment Tool Included: Yes Pilot Bushing Included: No Counterweight Assist: No Mounting Hardware Included: No Quantity: Sold as a kit. Notes: The pressure plate in this kit must be used with SACHS dual-mass flywheel. 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.