Circle D GM 252mm Pro Series 4L60 LS Torque Converter

Circle D Specialties GM 252mm Pro Series 4L60 LS Torque Converter

The Circle D Specialties GM 252mm Pro Series 4L60 LS Torque Converter is the ultimate, no-compromise upgrade for high-horsepower GM vehicles equipped with a 4L60 transmission and LS engine. Designed to handle aggressive track abuse, heavy nitrous, or forced induction, this premium converter features a smaller 252mm diameter to reduce rotational mass, resulting in lightning-fast engine response and optimized stall characteristics for maximum performance.

Built to withstand extreme torque loads, this Pro Series torque converter features a completely rigid, CNC-machined billet steel front cover that eliminates the ballooning and flexing common in stamped factory covers. To truly maximize this converter's potential in extreme builds, we highly recommend upgrading to the 3 Disk Lock Up for wide-open-throttle locking capability, and the Mechanical Diode sprag for bulletproof durability during aggressive launches. For hardcore racers, an optional Billet Steel Bolt-Together configuration is available for track-side stator tuning and easy maintenance. Pair your custom converter with an optional heavy-duty Billet Flexplate to ensure your entire drivetrain can handle the dominant track performance you expect from Circle D Specialties.

Key Features & Premium Upgrades

• Designed for GM 4L60 transmissions with LS engines
• Compact 252mm diameter for reduced rotational mass and faster revs
• Rigid one-piece billet steel front cover prevents ballooning under heavy boost or nitrous
• Optional 3-Disk Lock-Up: Exponentially increases torque holding capacity for WOT lock-up
• Optional Mechanical Diode: The ultimate sprag upgrade for transbrake use and high-impact launches
• Optional Bolt-Together Billet Housing: Enables quick track-side stator swaps and easy cleaning
• Optional Billet Flexplate: Add a 6-bolt or 8-bolt billet flexplate to prevent catastrophic factory flexplate failure
• Hand TIG welded construction for maximum structural integrity
• Heavy-duty Torrington bearings and exclusive CDS bearing retainer

Specifications

• Application: High-Performance Torque Converter
• Transmission Compatibility: GM 4L60
• Engine Compatibility: LS
• Converter Diameter: 252mm
• Construction: Billet Front Cover, Hand TIG Welded (Billet Bolt-Together Optional)
• Clutch Lining: Non-Lockup, Single Disk, or Upgraded 3-Disk Lock-Up Available
• Sprag: Spragless or Upgraded Mechanical Diode Available
• Horsepower Capacity: Built for extreme horsepower, forced induction, and heavy track abuse

Notes

• Built to order based on your exact specifications.
• Estimated build time: 4-6 weeks.