The BD 68RFE Torq Force Enhanced Stall Converter is designed for stock and modified 6.7L Diesels, from 350 to 550 flywheel horsepower, used in street and towing applications, at a great price. Featuring BD's exclusive 'Enhanced Stall' performance cast aluminum stator that improves efficiency and durability for low RPM response in stock to higher horsepower applications. The 68RFE Torq Force uses a billet forged front cover machined with thicker walls and stronger mounting pads and a 11.625 in. dual - clutch. The turbine fins are furnace - brazed for improved fluid coupling efficiency and new piston damper springs are installed for longevity and durability.