"Severe Duty" Drum Assembly Kit - Billet Aluminum Direct & Intermediate Pistons

ATI Racing's Severe Duty Drum Assembly Kits are engineered to deliver unmatched strength and reliability for high-performance automatic transmissions. Each kit features a lightweight billet aluminum drum paired with an ATI-manufactured outer race, precision-machined to accept OEM TH400 clutches for dependable performance and compatibility. A 36-element intermediate sprag provides exceptional torque-handling capability, while a machined pressure plate ensures consistent clutch apply and release. The assembly includes all critical components such as snap rings, springs, and seals, along with a steel sleeve designed for Teflon ring use, enhancing durability under extreme operating conditions. With a full one-year warranty against sprag failure when installed in an ATI-built transmission, this kit offers the ultimate in confidence and performance for demanding street or racing applications.