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.
I've used several of the Powerglide 10-clutch drum kits in drag racing performance builds. The quality and reasonably priced product makes the choice to use over a stock or reconditioned drum a no-brainer.G. Carson