The Sonnax 10-clutch system increases lockup surface in GM Powerglides for significantly more torque capacity than modified OE drums. The drum kit includes 10 .060" frictions and 10 .060" thick, 12-lug steels, increasing lockup surface to allow significantly more torque than modified OE drums. Sonnax 10-clutch drum kit 28756-01K is a complete drum kit that includes all high-clutch-related components, including a pre-installed, PTFE-coated bushing. Patented drum, hub and piston system improves clutch capacity for maximum durability High-strength drum with reduced rotating mass improves on-track acceleration 6061 Forged piston will not crack like cast pistons Forged chromoly clutch hub guarantees your power makes it to the wheels Contents 10-Clutch Piston High Clutch Return Springs (24) Clutch Drum Spring Retainer Lip Seal Large Lip Seal Small Frictions (10) .060" Kolene® Steels (10) 12-Tooth Bushing PTFE-Coated 10-Clutch Hub with Lightening Holes Retaining Ring Large Retaining Ring Small Wear Plate Large Wear Plate Small Shim 10-Clutch Drum