10-1/2", single clutch disc. Organic disc for single disc pressure plate, weighs 2.5 lbs. Full face design with solid hub. 1-1/8"-10 Spline. 2.5 lbs. Tech Tip:When installing a new clutch, be sure to follow the manufacturers instructions for correct set-up. You should also replace the pilot bushing/bearing. Tech Tip: To extend the life of your expensive racing clutch you should not use it to load the car on or in your trailer. The amount of slippage this causes is worse than a night of racing. Item Details1-1/8"-10 Spline 2.5 lbs. Clutches, Flywheels and release bearings are STRICTLY FACTORY WARRANTY ONLY. Customer must return the unit to RAM for evaluation and inspection. For a full list of warranty information please see our warranty information here