Circle D Ford 258mm Pro Series 4R70 Torque Converter
CIRCLE D SPECIALTIES
SKU #CDS-4R70-PRO-258MM
$1,199.00
Was
$1,199.00
Was
Was
Circle D Specialties Ford 258mm Pro Series 4R70 Torque Converter The Circle D Specialties Ford 258mm Pro Series 4R70 Torque Converter is a highly versatile, high-performance upgrade for enthusiasts running a Ford 4R70 transmission in their modified street or strip vehicle. The 258mm (10 1/4-inch) diameter offers a perfect middle ground—its lightweight design significantly reduces rotational mass for rapid throttle response and quick acceleration, while maintaining slightly more surface area than our 245mm option for excellent streetability and efficient torque transfer.
SKU
CDS-4R70-PRO-258MM
Qty
Circle D Specialties Ford 258mm Pro Series 4R70 Torque Converter
The Circle D Specialties Ford 258mm Pro Series 4R70 Torque Converter is a highly versatile, high-performance upgrade for enthusiasts running a Ford 4R70 transmission in their modified street or strip vehicle. The 258mm (10 1/4-inch) diameter offers a perfect middle ground—its lightweight design significantly reduces rotational mass for rapid throttle response and quick acceleration, while maintaining slightly more surface area than our 245mm option for excellent streetability and efficient torque transfer.
Engineered to deliver massive value and unshakeable strength, this Pro Series converter features a rigid one-piece billet front cover and a billet lockup piston, completely eliminating the flex and ballooning issues common with stamped factory components. Inside, a flanged impeller hub ensures superior anti-flex durability, while the internal assemblies are fully furnace brazed and hand TIG welded for maximum structural integrity under heavy torque loads. Hand-assembled to exacting tolerances, this converter delivers dominant, reliable track performance while maintaining perfect composure for everyday street driving.
Key Features
- Designed specifically for Ford 4R70 transmissions
- 258mm (10 1/4") diameter delivers a superior balance of rapid engine response and streetable torque holding
- Rigid one-piece billet front cover and billet lockup piston prevent flexing and ballooning
- Flanged impeller hub engineered for superior anti-flex durability
- Fully furnace brazed internals with hand TIG welded construction
- Heavy-duty Torrington bearings for smooth, reliable operation
- Hand-assembled to exacting tolerances for dominant track performance
Specifications
- Application: High-Performance Street/Strip Torque Converter
- Transmission Compatibility: Ford 4R70
- Converter Diameter: 258mm (10 1/4")
- Construction: Billet Front Cover & Piston, Furnace Brazed, Hand TIG Welded
- Bearings: Heavy-Duty Torrington Bearings
- Options: Multiple Stall Speeds (2800 up to 3700 RPM), Lock-Up Configurations, and Sprag Options available
Notes
- Custom manufactured product built to your exact specifications.
- Estimated lead time: 3-4 weeks.
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