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Looks aren't everything…but with regards to torque converters, they can hide the secret to winning races. For sanctioning bodies that mandate the use of a "stock appearing" converter, TCI® Circle Track Torque Converters satisfy the rulebook requirements while delivering a distinct performance advantage. TCI® Circle Track Torque Converters are specially designed with a lower "positive lock-up" stall speed, eliminating approximately 10% of the power robbing slippage found in OEM and lesser quality converters. On the track, this results in huge off-the-corner acceleration improvements and the ultimate in "green flag" starting speed.

Built with a heavy-duty stator, furnace-brazed fins and precision-certified stall speed to maximize efficiency, these stock appearing converters usually reduce lap times by one to two-tenths of a second. In addition, these converters feature reduced rotational weight to improve engine braking in corners and lower transmission operating temperatures.

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  1. GM TH350/400 Circle Track 11" FastLap Torque Converter

    GM TH350/400 Circle Track 11" FastLap Torque Converter

    SKU: 240920
    $374.99

    Good for Heavier Cars, Low Stall, Good Throttle Response

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  2. GM '65-'91 TH350/400 10" FastLap & Low Stall Configuration StreetFighter® (2300-2600 Stall RPM, Dual Bolt Pattern)
  3. GM TH350/400 10" FastLap (2300-2600 Stall RPM) & '65-'81 TH350/375 StreetFighter® (Low Stall Configuration)
  4. GM TH350/TH400 Circle Track 10" FastLap Torque Converter (1800-2000 Stall RPM)

    GM TH350/TH400 Circle Track 10" FastLap Torque Converter (1800-2000 Stall RPM)

    SKU: 242125
    $257.98

    Good for Very Heavy Cars, Excellent Throttle Response

    Learn More
  5. GM TH350/TH400 Circle Track 10" FastLap Torque Converter  (1800-2000 Stall RPM) for 1/4" Midplates

    GM TH350/TH400 Circle Track 10" FastLap Torque Converter (1800-2000 Stall RPM) for 1/4" Midplates

    SKU: 242126
    $269.96

    Good for Very Heavy Cars, Excellent Throttle Response

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  6. GM Powerglide Circle Track 10" FastLap Torque Converter

    GM Powerglide Circle Track 10" FastLap Torque Converter

    SKU: 741025
    $279.99

    Good for Heavier Cars, Low Stall, Good Throttle Response

    Learn More
  7. GM Powerglide Circle Track 10" FastLap Torque Converter (For 1/4" Midplates)

    GM Powerglide Circle Track 10" FastLap Torque Converter (For 1/4" Midplates)

    SKU: 741026
    $287.99

    Good for Heavier Cars, Low Stall, Good Throttle Response

    Learn More
  8. GM Powerglide Circle Track 10" FastLap "Dummy" Torque Converter

    GM Powerglide Circle Track 10" FastLap "Dummy" Torque Converter

    SKU: 741050
    $319.98

    Non-Functional/Direct Drive; Where Rules Do Not Require a Functioning Converter

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  9. GM Powerglide Circle Track 11" FastLap Torque Converter (2000-2300 Stall RPM)

    GM Powerglide Circle Track 11" FastLap Torque Converter (2000-2300 Stall RPM)

    SKU: 741115
    $344.99

    Good for Heavier Cars, Low Stall, Good Throttle Response

    Learn More
  10. GM Powerglide Circle Track 11" FastLap Torque Converter (1800-2100 Stall RPM)

    GM Powerglide Circle Track 11" FastLap Torque Converter (1800-2100 Stall RPM)

    SKU: 741125
    $344.99

    Good for Heavier Cars, Low Stall, Good Throttle Response

    Learn More

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