Circle D 258mm Pro Series 4R70 Torque Converter

Circle D 258mm Pro Series 4R70 Torque Converter

• Excellent option for turbo or PD blower cars
• 258mm Pro Series
• Comes standard with single disk lock up, but can be upgraded to triple disk
• Can be upgraded to a mechanical diode sprag, or spragless
• Stall speed can be in 200 RPM windows from 2800-3700
• Anti-balloon plate on pump and turbine
• Billet front cover and billet piston
• Furnace brazed
• Flanged impeller hub for anti-flex durability
• Tig welded design
• Can be used in 4R70 and 4R75 applications

If you need help with the stall speed selection, you can call and ask us or Circle D directly. Be ready to provide information such as, but not limited to:

• How much HP is the car making?
• What power adder is being used?
• Is the car raced, street driven, or both?
• Approximate weight of vehicle.
• Camshaft RPM power range.