TH400 BILLET ALUMINUM PISTON, FWD/DIRECT .750" TALL. WITHOUT CHECKBALL

The Coan Racing COA‑22830A TH400 Billet Aluminum Forward/Direct Piston (.750″ Tall) – Without Check Ball is a high-performance replacement piston designed to upgrade the Turbo Hydramatic 400 transmissions. Manufactured in the USA from robust billet aluminum, this piston extends to .750″ tall, which increases hydraulic volume and enhances piston rigidity, critical for maintaining reliable clutch pressure under demanding racing conditions. Unlike other versions, the COA‑22830A omits the check ball.

The direct-fit design allows installation without modifying the drum or transmission case, delivering improved hydraulic control, durability, and front-end response for drag, bracket, or performance-street applications.