GM Aluminum Powerglide Sonnax 28756-01K 10-Clutch Drum Kit fits Chevy Nova, Chevelle, Corvette, GMC 1962 - 1972 This 10-clutch drum kit 28756-01K is optimized for Powerglide performance applications. Using the patented Sonnax 10-clutch drum system, the drum and piston accept 10 frictions and 10 Kolene® steels, increasing lockup surface to allow significantly more torque than modified OE drums. The drum features a piston bore that is .060" deeper for greater piston travel than was available from Sonnax 10-clutch drum kit 28755-08K (discontinued). Complete 10-clutch drum kit with all related parts including installed PTFE-coated bushing Kit includes 10 .060" frictions and 10 .060" thick, 12-tooth Kolene® steels Excess material removed from high-strength, cast steel drum to reduce rotating mass 6061 Forged aluminum piston will not crack at high operating pressure like cast pistons Forged chromoly steel clutch hub with lightening holes This Kit includes: 10-Clutch Drum 10-Clutch Piston Bushing PTFE-Coated 10-Clutch Hub with Lightening Holes High Clutch Return Springs (24) Clutch Drum Spring Retainer Retaining Ring Large Retaining Ring Small Wear Plate Large Wear Plate Small Lip Seal Large Lip Seal Small Frictions (10) .060" Kolene® Steels (10) 12-Tooth Shim