Big power turbo, supercharged, and nitrous 4R100 builds need a converter that can handle the abuse without falling apart, and the factory unit simply wasn't built for it. The Circle D 252mm Pro Series 4R100 Torque Converter is designed for 800+ horsepower applications, giving serious builds a converter that can actually keep up with the power behind it.
Built for maximum adjustability. A CNC machined steel stator gives Circle D the ability to fine tune this converter's behavior to your specific combination, rather than relying on a one size fits all design. A mechanical diode one way clutch improves efficiency and response compared to the factory roller clutch design, and the multiple bolt pattern front cover adds flexibility for different setups. This level of adjustability is what separates a converter built for extreme power from one that's simply upgraded.
Reinforced where big power destroys factory converters. Anti-balloon plates on the pump and turbine keep the converter's internal components from flexing and failing under the kind of pressure that big turbo, blower, or nitrous combinations put out. The billet front cover adds strength right where factory covers are known to fail. Furnace brazed construction and hand TIG welding replace the factory stamped and glued assembly, giving this converter the durability to survive repeated high horsepower passes.
Product Benefits
- Designed for 800+ horsepower applications
- CNC machined steel stator
- Mechanical diode one way clutch
- Multiple bolt pattern front cover
- Anti-balloon plates on pump and turbine
- Billet front cover
- Furnace brazed and hand TIG welded
- Built for big turbo, blower, or nitrous combinations
- Maximum tunability for your setup
- Custom manufactured in the USA
About Circle D Specialties: Circle D Specialties has been building torque converters since 1976, growing from a Houston auto repair shop into one of the most trusted names in performance transmission technology. Using CFD modeling, SolidWorks design, and 5-axis CNC machining done entirely in-house, Circle D custom tailors converters to match each customer's exact combination. Their converters have powered record setting drag cars, including the Silver Bullet, which set the world record for fastest naturally aspirated S550 Mustang, alongside a wide range of high horsepower street and race builds.
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