Circle D GM 252mm Pro Series 6L80/6L90 Torque Converter

Circle D Specialties GM 252mm Pro Series 6L80/6L90 Torque Converter

The Circle D Specialties GM 252mm Pro Series 6L80/6L90 Torque Converter is a top-tier, custom-built racing converter designed for extreme high-horsepower street and strip vehicles running a GM 6L80 or 6L90 transmission. The highly compact 252mm diameter significantly reduces rotational mass for explosive throttle response while utilizing a premium CNC Machined Steel Stator. This allows for maximum stall adjustability and perfectly dialed-in launch characteristics tailored specifically to your engine combination.

Engineered to survive the absolute limits of track abuse, this premium converter features a rigid billet front cover with multiple bolt pattern options, along with heavy-duty anti-balloon plates on both the pump and turbine to completely eliminate expansion under load. The internal assemblies are fully furnace brazed with hand TIG welded fins to maintain unshakeable structural integrity under massive torque loads. Equipped with a bulletproof Mechanical Diode one-way clutch, it offers absolute reliability for hardcore transbrake launches, and provides both Single and Triple Disk Lockup options depending on your WOT holding capacity needs. For serious racers, an optional Bolt-Together Upgrade is available, along with heavy-duty Billet Flexplates for LS and Gen-V LT engines to complete your bulletproof drivetrain.

Key Features & Upgrades

• Designed specifically for GM 6L80 and 6L90 transmissions
• Compact 252mm diameter for reduced rotational mass and explosive throttle response
• CNC Machined Steel Stator offers maximum stall adjustability (Stall options up to 4200 RPM)
• Single and Triple Disk Lockup options available for extreme holding capacity
• Rigid billet front cover with multiple bolt pattern configurations
• Integrated Anti-Balloon Plates on both the pump and turbine
• Mechanical Diode one-way clutch for bulletproof reliability
• Optional Bolt-Together Upgrade: Available for easy track-side maintenance and tuning
• Optional Billet Flexplate: Available in 6-Bolt or 8-Bolt Crank Flange for LS/Gen-V LT Engines
• Fully furnace brazed and hand TIG welded fins for maximum durability

Specifications

• Application: Extreme High-Performance Street/Strip/Race Torque Converter
• Transmission Compatibility: GM 6L80 / 6L90
• Converter Diameter: 252mm
• Construction: Billet Front Cover, Anti-Balloon Plates, Furnace Brazed, Hand TIG Welded Fins
• Stator: CNC Machined Steel
• Options: Bolt-Together Housing, Lock-Up Configurations, Bolt Pattern Options, and Billet Flexplate

Notes

• Custom manufactured product built specifically to your build's exact specifications.
• Estimated lead time: 6 weeks.