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 , 24-lug steels, increasing lockup surface to allow significantly more torque than modified OE drums.

Sonnax 10-clutch drum kit with bearing 28756-08K is a complete drum kit that includes all high clutch related components, including a pump-to-drum bearing and shim, plus a pre-installed, PTFE-coated bushing. The Sonnax drum has material removed for the kit's bearing, allowing overall stack up to be .060" taller than an OE drum alone.

• Patented drum, hub and piston system improves clutch capacity for maximum durability
• 24-Lug steels feature turbulator holes and optional rubber separators.
• 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