Billet Aluminum FWD / Direct Piston .555" Tall Without Checkball

BILLET ALUMINUM FWD/DIR PISTON (.555") W/OUT CHECKBALL

USE THIS PISTON IN COAN BILLET ALUM FWD OR DIR DRUM W/ CHECKBALL(S) FOR 6 CLUTCHES

The Coan Racing COA‑22830C Billet Aluminum Forward/Direct Piston (.555″) – Without Check Ball is a precision-engineered upgrade designed for high-performance TH400 direct drum assemblies. Machined from premium billet aluminum in the USA, this piston measures .555 inches tall and enhances structural strength and hydraulic stability compared to stock cast units. Specifically built for use in Coan billet aluminum forward or direct drums equipped with check balls for six-clutch packs, it supports reliable fluid flow and engagement consistency while simplifying front-end builds by eliminating the internal check ball.

The COA‑22830C is a direct-fit solution that requires no modifications to the drum or transmission case, making it an ideal component for builders seeking clean-in, race-ready performance improvements.