The Centerforce(R) I Clutch Series utilizes a full facing disc with premium friction material and is designed as a high-quality entry-level performance clutch for those in need of a superior stock replacement. Using the Centerforce centrifugal weights (where applicable) the Centerforce Stage 1 clutch system is perfect for applications with stock engines or mild power increases from minor bolt-on modifications. Pressure plate and disc sold separately on some applications. The Torque Figures for Centerforce I Pressure Plates are based and calculated in conjunction with a Centerforce I & II Clutch Disc. 10.4 Diameter; Attributes GTIN: 00788442029376 Brand Name: Centerforce Clutch Bolt Pattern4: 2 Clutch Disc Diameter: 10.4 Counterweight Assist7: YES Disc Material3: Organic Disc Type Sprung Solid4: Sprung Disc Type6: Full face Input Shaft Diameter1: 1-1/8 Input Spline Quantity2: 26 Material5: Nodular Iron Pressure Plate / Organic Friction Torque Capacity: 400 Extended Information Country of Origin: Korea Republic of Emissions : Released Life Cycle Status: Available To Order Packing Information Quantity of Each: 1 Package UOM: EA Dimension: 18 x 18 x 5.5 inches Weight: 24 lb