Circle D GM 264mm Pro Series PG/350/400 Torque Converter

Circle D Specialties GM 264mm Pro Series PG/350/400 Torque Converter

The Circle D Specialties GM 264mm Pro Series PG/350/400 Torque Converter is a top-tier, custom-built racing converter designed for extreme high-horsepower track vehicles running a GM Powerglide, TH350, or TH400 transmission. The 264mm diameter offers a superb balance of reduced rotational mass for explosive throttle response and the necessary surface area to handle extreme torque loads. Built specifically for racers, it features a premium CNC Machined Steel Stator, allowing for maximum stall adjustability and perfectly dialed-in launch characteristics.

Engineered to survive the absolute limits of drag racing abuse, this premium converter is equipped with a rigid billet front cover featuring multiple bolt patterns and a universal screw-on pilot for seamless installation. To prevent expansion under massive power, heavy-duty anti-balloon plates are integrated on both the pump and turbine. The internal assemblies are fully furnace brazed with hand TIG welded fins to maintain unshakeable structural integrity. Racers can also choose between a bulletproof Mechanical Diode or a Spragless design to ensure ultimate reliability during hardcore transbrake launches.

Key Features & Upgrades

• Designed specifically for GM Powerglide (PG), TH350, and TH400 transmissions
• Rigid billet front cover featuring multiple bolt patterns (custom bolt patterns also available)
• Screw-on pilot featuring a universal bolt pattern for optimal fitment
• Integrated Anti-Balloon Plates on both the pump and turbine prevent flexing and expansion
• CNC Machined Steel Stator offers maximum stall adjustability (Stall options from 3600 up to 6000 RPM)
• Choice of a Spragless or Mechanical Diode one-way clutch for bulletproof reliability
• Fully furnace brazed internals with hand TIG welded fins for maximum durability
• Hand-assembled to exacting tolerances for dominant track performance

Specifications

• Application: Extreme High-Performance Drag Racing/Strip Torque Converter
• Transmission Compatibility: GM Powerglide, TH350, TH400
• Converter Diameter: 264mm
• Construction: Billet Front Cover, Anti-Balloon Plates, Furnace Brazed, Hand TIG Welded Fins
• Stator: CNC Machined Steel
• Options: Spragless or Mechanical Diode, Multiple Stall Speeds (3600 - 6000 RPM)

Notes

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