Circle D GM 300mm HP 4L60 LS Torque Converter

Circle D GM 300mm HP 4L60 LS Torque Converter

Regular price $699.99 Save $-699.99

SKU: 01-07-09

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(Built to Order 2-3 Weeks Build Time)

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GM 300mm HP 4L60 LS Torque Converter

This factory diameter converter is an excellent option for someone looking for a stock-like feel with a bit more performance and durability. We highly recommend this unit for heavy trucks and towing use.

Great option for Daily Driver vehicle looking for a little more stall. Will drive 99% stock under light throttle.


  • Converter diameter: 300mm - 12" 
  • Stall speeds 1800-2600
  • Hand TIG Welded 
  • Woven Lockup Clutch Lining 
  • Heavy Duty Torrington Bearings 
  • Flanged Hub
  • Bearing Retainer

Converter Recommendations

  • 245mm - N/A Combinations (Cars and RCSB Trucks)
  • 258mm - Boosted Combinations (Cars, RCSB Trucks, and aggressive ECSB/CCSB trucks)
  • 265mm - N/A or Boosted Extended Cab/Crew Cab Trucks 
  • 300mm/Triple Disk Pro Series - Very mild cam combinations or OE stall speed / heavy duty replacements