Billet Input Shaft

The SunCoast Performance 5R-BIS is a high-strength billet input shaft engineered to replace the factory component in Ford E4OD, 4R100, and 5R110 transmissions. Crafted from premium 300M billet steel, this shaft undergoes a rigorous heat-treatment and precision-grinding process to ensure exceptional durability and performance. With a robust torque rating of 2000 ft/lb and a 30/31 spline count, the 5R-BIS is specifically designed for demanding high-torque diesel and off-road applications. It provides significantly increased strength compared to stock input shafts, effectively resisting twisting and breakage, even under heavy loads and aggressive tuning. This upgrade is ideal for towing, performance builds, and enhancing long-term transmission reliability. Originally specified for 2003-2010 Ford F250/F350 models equipped with 6.0L and 6.4L Powerstroke engines, this billet input shaft is a critical component for those pushing their drivetrain's limits. It offers peace of mind by strengthening the transmission's backbone and preventing potential failures that can occur with modified or heavily utilized powertrains.