RAM Clutches for 'stock clutch rule' classes are available in several configurations. Leading the way in light weight is our 10. 5 inch diameter assembly that utilizes a billet aluminum pressure ring with a riveted steel heat shield that provides a durable mating surface for the clutch disc. a heavy duty pressure spring provides increased static pressure over stock clutches. Used in conjunction with a RAM six paddle solid hub disc, this combination weighs in at just over 15 pounds. If your rules require a full facing or sprung hub disc, the RAM 300 Series organic racing disc provides the best holding power of any organic disc available and adds only about 2 pounds to the total weight of the set. RAM offers a lightweight 15 pound billet steel flywheel for Chevrolet that matches the above components. If you are required to use all steel components, RAM offers a similar 10. 5 inch pressure plate with a nodular iron pressure ring. This unit uses the same heavier pressure spring for increased holding power. All RAM street stock clutches are completely rebuildable by the factory. THESE SETUPS ARE EXCELLENT FOR ROAD RACING and AUTOCROSS APPLICATIONS!Pit Stop USA offers RAM Automotive 10.5 x 1 1/8 -26 Spline Organic Disc 309M at low everyday prices. Be sure to check out all of our products from Ram Automotive including Ram Automotive Clutch Discs.