Drivetrain› Automatic Transmissions and Components

Circle D Specialties

Pro Series 252mm Torque Converter for 4L80E

$2,899.00

SKU: 05-12H-34

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Circle D Specialties Pro Series torque converter is a 252mm unit designed for 4L80E transmissions. It features a stall speed of 3400-3600 RPM and is compatible with LS or Gen-V LT engines. This converter is rated for 800+ horsepower.
Show original supplier description
The Circle D Specialties 252mm Pro Series torque converter is engineered for high-performance 4L80E transmissions. This custom-manufactured product offers a significant upgrade for vehicles equipped with LS or Gen-V LT engines. Its robust design provides a stall speed range of 3400-3600 RPM, catering to demanding driving conditions and offering enhanced control. Built to handle extreme power, this torque converter boasts an impressive horsepower rating of 800+ HP. It is constructed with premium materials, ensuring durability and reliability under high-stress applications. The 252mm diameter is optimized for efficient power transfer and performance gains. Consideration should be given to potential installation options, such as the Circle D Specialties Billet Flexplate, which is available as an optional upgrade for LS or Gen-V LT engines, and comes in various bolt patterns to ensure proper fitment with your specific crank flange and transmission.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandCircle D Specialties
Part Number05-12H-34
CategoryDrivetrain
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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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