"Turbo XST" Kit w/ 1-1/8" 35 Spline Alloy Input Shaft & 7075 Billet Aluminum Drum

TURBO XST KIT

• Includes 1-1/8" 35 spline alloy input shaft
• Cast iron stator assembly w/ 27 spline GM heat treated spline-in stator
• 7075 billet aluminum forward drum
• Requires GM converter w/ 35 spline AOD turbine

The Coan Racing COA‑22880B “Turbo XST” Kit is a premium, front-end package crafted for Turbo Hydramatic 400 transmissions paired with torque converters, such as GM 35-spline AOD turbine units. This comprehensive kit includes a 1-1/8″, 35-spline alloy input shaft engineered for superior torsional rigidity and engagement strength, ensuring secure power transfer in extreme torque environments. Complementing the shaft is a heavy-duty cast-iron pump assembly, complete with a heat-treated, 27-spline GM spline-in stator designed to withstand elevated operating pressures and repeated high-RPM cycles.

At its core lies a 7075 billet aluminum forward drum capable of accommodating advanced clutch configurations and hardened to deliver reliable performance under load. The assembly drops into a stock-style TH400 case without needing modifications, though it requires mating with a GM converter featuring a 35-spline AOD turbine, making it ideal for XST-driven competition setups.

Built in the USA to Coan’s exacting performance standards, the COA‑22880B Turbo XST kit offers a robust foundation for drag, bracket, and pro-street builds. Its combination of high-strength alloy and steel components ensures reliable fluid dynamics, strong clutch engagement, and drivetrain stability, providing serious performance-ready upgrades engineered to deliver confidence and consistency under extreme load conditions.