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GM

GM

Circle D billet performance torque converters for GM transmissions — 4L60, 4L80, 6L80/6L90, 8L90, 10L90, and Powerglide/TH350/TH400.

  • GM 300mm HP 4L60 LS Torque Converter

    Original price $799.00 - Original price $899.00
    Original price
    $799.00 - $899.00
    $799.00 - $899.00
    Current price $799.00

    Great option for Daily Driver vehicle looking for a little more stall. Will drive 99% stock under light throttle. Converter diameter: 300mm - 12"...

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    Original price $799.00 - Original price $899.00
    Original price
    $799.00 - $899.00
    $799.00 - $899.00
    Current price $799.00
  • GM 245mm Pro Series 4L60 LS Torque Converter

    Original price $1,199.00 - Original price $1,549.00
    Original price
    $1,199.00 - $1,549.00
    $1,199.00 - $1,549.00
    Current price $1,199.00

    Our "go to" converter for the street/strip F-body, truck, GTO or similar. 97-04 Corvette See "4L60 LT Product Line"2005 C6 Corvette - Select Bolt P...

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    Original price $1,199.00 - Original price $1,549.00
    Original price
    $1,199.00 - $1,549.00
    $1,199.00 - $1,549.00
    Current price $1,199.00
  • GM 258mm Pro Series 4L60 LS Torque Converter

    Original price $1,199.00 - Original price $1,549.00
    Original price
    $1,199.00 - $1,549.00
    $1,199.00 - $1,549.00
    Current price $1,199.00

    Pro Series Billet Torque Converter Converter Diameter - 258mm - 10 1/4" Available in stall speeds from 2800 - 3700 rpm Furnace Brazed Hand TIG W...

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    Original price $1,199.00 - Original price $1,549.00
    Original price
    $1,199.00 - $1,549.00
    $1,199.00 - $1,549.00
    Current price $1,199.00
  • GM 265mm Pro Series 4L60 LS Torque Converter

    Original price $1,199.00 - Original price $1,549.00
    Original price
    $1,199.00 - $1,549.00
    $1,199.00 - $1,549.00
    Current price $1,199.00

    Pro Series Billet Torque Converter Converter Diameter - 265mm - 10 1/2" Available in stall speeds from 2500 - 3400 rpm Furnace Brazed Hand TIG W...

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    Original price $1,199.00 - Original price $1,549.00
    Original price
    $1,199.00 - $1,549.00
    $1,199.00 - $1,549.00
    Current price $1,199.00
  • GM 252mm Pro Series 4L60 LS Torque Converter

    Original price $2,249.00 - Original price $2,899.00
    Original price
    $2,249.00 - $2,899.00
    $2,249.00 - $2,899.00
    Current price $2,249.00

    This is our most durable and adjustable option for the high hp street/track cars. Designed for use in 800+HP, this converter is the perfect match f...

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    Original price $2,249.00 - Original price $2,899.00
    Original price
    $2,249.00 - $2,899.00
    $2,249.00 - $2,899.00
    Current price $2,249.00

Tech Articles

  • 4L80 Torque Converter Clutch Drag?
    Brady Fedro

    4L80 Torque Converter Clutch Drag?

    Let's talk about torque converter clutch drag when using a multi disc torque converter in a 4L80E transmission. We see this issue come up from time to time, especially (but not limited to) in 4L80E applications equipped with a transbrake...

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