***IF INSTALLING ON A 6.4L, MUST USE A 6 OR 12 BOLT DESIGN FLEX PLATE LIKE THE ATS BILLET FLEX PLATE*** Standard in all transmission packages, and available individually, is the ATS Five Star Torque Converter. This torque converter is built to handle daily driving and towing duties while delivering reliable performance. Key features of the ATS Five Star Torque Converter include: Patented Viskus Clutch Drive System for increased efficiency Billet Cover with Patented Square Flank Drive Square Tab Construction (Not Round) Viskus Disc CNC Laser Cut Clutch Plates Billet Piston with Patented Flank Drive Tab design Proprietary ATS exclusive Clutch Formulation with unique bonding technology (ensures 100% chemical Bond) Redesigned Spring Dampener supports increased torque loads 4340 hardened turbine splines provide longevity and reliability Fully welded turbine and impeller vanes CNC Stator with high flow windows increase oil flow, providing increased efficiency Full roller bearing construction between high load areas 4340 CNC cut pump drive hub locked into impeller housing Plasma welded for unsurpassed strength The ATS Five Star utilizes an optimized factory stall speed that features improved torque multiplication. With factory torque multiplication at approximately 1.25:1, the ATS Five Star boasts 2.4:1. This occurs when peak engine torque is achieved. Increased torque multiplication results in improved vehicle response, towing and driving ability. Every Five Star comes standard with a 5 year / 500,000 mile warranty. When the most efficient torque converter is required, look no further than ATS? Five Star Torque Converter.