Building huge horsepower is fine as long as your drivetrain is up to the task of delivering the power to the pavement. TCI offers a complete line of premium torque converters built exclusively for use in Top Sportsman Top Dragster and 10.5 Tire Outlaw classes. Able to handle 500+ c.i. 2500+ horsepower 3500 RPM applications (including multi-stage nitrous-assisted supercharged and twin turbocharged engines) these high strength torque converters are built for most GM Ford and Chrysler transmissions and bolt up to either six or four-bolt mounting flanges. In addition the PRO-X 9" and 10" Torque Converters utilize the state-of-the-art proprietary metallic gray HDT Coating which enables TCI converters to operate at lower temperatures and cool down faster. Bulletproof Hand-Built Steel Stator. Billet Mounting Ring. Three Sets of Heavy-Duty Internal Bearings. Furnace-Brazed and Hand-Brazed Turbine and Pump Assembly. Fits GM Turbo Spline Transmissions. 4000 RPM Base Stall Range / 4400 RPM Upper Stall Range. Stall speed is an approximation - will vary per CID; dyno torque; HP ratings; power adders such as turbo(s) amount of boost blower size and amount of boost amount of initial nitrous applied. When power adder is used refer to upper stall range.