Engineered to perform.Built to launch.
Houston, TX
4500HP
Every component, engineered with intent.
10 Speed Pro SeriesTorque Converter · 10R80 / 10L90
Impeller Hub
Forged impeller hub with integrated balloon plating.
Impeller
Welded impeller pump housing — spins with the engine and drives the fluid coupling (10R80-258-PUMP).
Billet Stator
Machined stator — redirects fluid back into the impeller to multiply torque (10R80-257/275 STATOR).
Turbine Assembly
Furnace-brazed bronze turbine with hub, hub plate and welded 32T clutch hub — one finished component (10R80-258-TURBINE-V2 · THB-10R-L-PRO · THP-10RL-258-PRO).
Top Plate
Billet backing plate reacting clamp load across the bolt circle.
Clutch Pack
Three copper friction discs alternating with three hardened reaction steels (CLT-10RL-PRO-STEEL-258).
Piston
Billet lockup piston delivering consistent, repeatable clamp load (CLT-10RL-PRO-PISTON).
Center Section
Billet center section riding on Torrington bearings.
Front Cover
CNC-machined billet 4140 impeller cover with a hardened pilot hub (FCV-10R-PRO-258).
How we build it.
Spec
You tell us the combo. We'll take it from there to ensure your converter matches exactly what you need — no generic "off-the-shelf" here.
Machine
Billet components — CNC-machined to precise tolerances, all done in-house in Houston, Texas.
Build
Fully hand-assembled, tolerance checked, and signed off by one of our specialists.
Verify
Every converter clears a multi-stage QC gate — dimensional inspection, balance, leak and pressure verification — signed off before it leaves the floor.
Ship
Protected, tracked, and out the door — fast.
Not sure what you need? We'll spec it.
You tell us your combination — engine, transmission, power adder, goals — and we'll take it from there. Every converter leaves here 100% custom tailored to your setup.
Sell Circle D.
Wholesale pricing, dealer-only inventory visibility, fast reorders, and direct access to our team. Join the network powering shops nationwide.
Trusted by enthusiasts
"The technical feedback was detailed, communication was clear and they made a stressful situation much easier to manage."
"They came highly regarded as one of the best in this business and now I'm a believer. Very good experience, definitely recommend."
"Received the converter fast!! It was very high quality and works very well… it locks up good."