Circle D GM 245mm Pro Series 4L60 LS Torque Converter

Circle D Specialties GM 245mm Pro Series 4L60 LS Torque Converter

The Circle D Specialties GM 245mm Pro Series 4L60 LS Torque Converter is the ultimate sweet spot for enthusiasts who need serious holding power without stepping up to a dedicated race-only converter. Designed for heavily modified street cars and weekend track warriors equipped with a 4L60 transmission and LS engine, this converter features a compact 245mm diameter. This smaller footprint drastically reduces rotational mass, allowing your engine to rev faster and flash instantly into its optimal powerband.

Delivering massive value at this price point, this Pro Series converter is packed with heavy-duty upgrades usually reserved for higher-tier race units. It features a rigid CDS Billet Front Cover and Billet Piston, completely eliminating the flex and ballooning issues common with factory stamped covers. Inside, the fins and turbine hub are furnace brazed and hand TIG welded for unshakeable durability, while a Heavy-Duty Impeller Hub cures common cracking problems. Hand-assembled to exacting tolerances, it delivers aggressive, reliable track performance while maintaining enough composure for weekend cruising.

Key Features

• Designed for GM 4L60 transmissions with LS engines
• Compact 245mm diameter for reduced rotational mass and faster throttle response
• Rigid CDS Billet Front Cover and Billet Piston for maximum durability
• Furnace brazed internals with hand TIG welded fins and turbine hub
• Integrated Anti-Balloon Plate prevents expansion under heavy torque loads
• Heavy-Duty Impeller Hub engineered to eliminate factory cracking problems
• Upgraded Torrington-style bearings and a Deep Groove Ball Bearing for smooth operation
• Multiple stall speed options available (ranging from 3200 up to 4600 RPM)

Specifications

• Application: High-Performance Street/Strip Torque Converter
• Transmission Compatibility: GM 4L60
• Engine Compatibility: LS
• Converter Diameter: 245mm
• Construction: Billet Front Cover, Furnace Brazed, Hand TIG Welded
• Bearings: Torrington-Style & Deep Groove Ball Bearing
• Flexplate Compatibility: Optional Circle D Billet Flexplate upgrade available

Notes

• Custom manufactured product built to your exact specifications.
• Estimated lead time: 3-4 weeks.