This TH400 Billet Aluminum Direct Drum is manufactured specifically for drag racing classes including Pro-Street, Pro-Mod and Top Sportsman.
Made from Billet Aluminum, 36 element Pro Mod Sprag and new large steel outer race to allow the use of more clutches. Used in applications up to 3000 HP. The drum and piston weight 55% less than the OEM spec drums.
1/4" locking dowels have been inserted to stop inner race movement along with a Steel sleeve for sealing ring. The Billet Aluminum Drum wtih Extra Large sprag utilizes OEM intermediate frictions & steels.