Pro Series Billet Torque Converter Converter Diameter - 265mm - 10 1/2" Available in stall speeds from 2500 - 3400 rpm Furnace Brazed Hand TIG Welded Torrington Bearings Billet Front and Billet Piston Deep Groove Ball Bearing Design for Longer Clutch Life Flanged Impeller Hub for Anti-Flex Durability Hand Assembled to Exacting Tolerances.