9" (245mm) High Performance Converter - Big Block

9" (245MM) HIGH PERFORMANCE CONVERTER (BIG BLOCK)

The Coan Racing COA-20425-1 9″ (245 mm) High Performance Converter (Big Block) is a purpose-built torque converter for TH350/TH400 transmissions powered by big block engines. With its compact 9″ size, it delivers high-performance stall characteristics tailored for aggressive launches and rapid fluid coupling, while fitting setups without modification. 

Ideal for racing, the COA-20425-1 maintains hydraulic stability through extended use, providing dependable launches and torque handling exactly when and where it’s needed. Built to Coan’s high performance standards, this converter brings a compact package loaded with thermal resilience, structural rigidity, and race-level hydraulics, making it a top-tier choice for high-output big block TH-series builds.