8" High Performance Race Converter, Spragless - Small Block / Big Block

8" HI PERFORMANCE RACE CONVERTER

• Spragless (Small or Big Block)

The Coan Racing COA-20503 8″ High‑Performance Race Converter – Spragless (Small or Big Block) is a purpose-built torque converter engineered for TH350 and TH400 transmissions in high-stress small or big block applications. With its compact 8-inch diameter, this converter delivers aggressive stall characteristics tailored to high-rpm launches and low-inertia performance. By eliminating the traditional sprag, it offers reduced parasitic losses and consistent, repeatable engagement.

Constructed to Coan’s rigorous "High Performance" standard, the COA-20503 features a reinforced components that maintain pump clearances under intense operating pressure. While this spragless version removes the one-way clutch, it retains the strength and durability of Coan’s race-caliber build for consistent performance in demanding small or big block setups.

Ideal for racers seeking maximum throttle response, minimized rotating mass, and dependable engagement, the COA-20503 stands out as a compact, high-performance solution engineered for the rigors of serious competition.