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Celebrating 250 Years of American Freedom, All Year Long! More Horsepower. More Burnouts.
Celebrating 250 Years of American Freedom. More Horsepower. More Burnouts.
GM 310mm HP Series 4L80 Torque Converter

Circle D GM 310mm HP Series 4L80 Torque Converter

by Circle D Specialties
310mm Stall Options: 1600-1800
Special Order Item: This item is not stocked in-house and may require additional processing time before shipping. Details
Made to Order (In-House): This item is built/assembled by our team. Build times vary by product — please refer to the product description for the most accurate lead time. Details
Special Order Made to Order
$1,099.00 - $1,099.00
$1,099.00
$1,099.00 - $1,099.00
$1,099.00

Product details

  • Billet Front Cover
  • Billet Lockup Piston
  • Carbon Lockup Clutch Lining
  • Furnace Brazed Pump/Turbine
  • Modified Impeller/Stator for Higher Stall
  • Flanged Impeller Hub

Ordering and production

Estimated lead time: 7–8 weeks before shipment. This includes Circle D's current production estimate plus additional time for specification review, order surges and the third-party handoff. It is an estimate, not a guaranteed delivery date.

SMGspeed may contact you after checkout to confirm the vehicle, transmission, engine combination, power level, power adder, intended use and requested stall before submitting the build.

Core notice: Some factory-core applications require a usable customer core. Any selection labeled CORE REQUIRED is priced with that requirement. Core freight, missing cores or unusable cores may create additional charges. SMGspeed will confirm any core requirement before production.

Custom made-to-order item: Review all selections carefully. Changes or cancellation may not be possible after production begins.

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