As part of its PRO-X line of hardcore racing components, TCI offers two PRO-X Input Shafts for hardcore GM Powerglide race applications.These input shafts eliminate breakage by incorporating unique proprietary construction material and a special heat-treating process. The PRO-X standard configuration input shaft is a direct replacement component able to handle up to 2000 HP applications. The PRO-X Ringless Input Shaft replaces the load-limiting internal rings with a special bushing and enlarges the diameter of the shaft for increased strength. In addition, TCI re-engineered and improved the shaft's full cooler circuit flow for more efficient torque converter function as well as better lubrication for improved strength and durability over other types of ringless input shafts. Able to handle up to 2500+ HP applications, use of the TCI Ringless Input Shaft requires installation of a TCI Gerotor Pump for proper operation.