Lightweight Billet Steel "Ultimate Super Drum" Assembly w/ Super Sprag, 5 Clutch Intermediate

LIGHTWEIGHT BILLET STEEL "ULTIMATE SUPER DRUM" ASSY. W/SUPER SPRAG, 5 CLUTCH INTERMEDIATE (INCLUDES COA-22230 & COA-22818A)

The Coan Racing COA‑22816B Lightweight Billet Steel “Ultimate Super Drum” Assembly is a premium front-end upgrade built for high-performance Turbo Hydramatic 400 transmissions. Machined in the USA from billet steel, this assembly combines exceptional strength with reduced mass to improve shift responsiveness and rotational efficiency. Its design features a high-capacity Super Sprag and a robust 5‑clutch intermediate pack, complete with Coan’s internal components (COA‑22230 & COA‑22818A)—offering substantial torque handling and clutch durability for demanding drag, bracket, or high-performance street builds.

As a direct-fit solution, the COA‑22816B drops into stock transmission cases without modifications, maintaining OEM clearances and compatibility. The lightweight billet steel construction strikes a balance between race-hardened durability and performance-focused weight reduction, ensuring smoother operation under high-heat, high-load conditions. This makes it an ideal choice for enthusiasts and racers seeking reliable, race-quality upgrades that deliver consistent power transfer, faster shift recovery, and long-term drivetrain resilience in extreme environments.