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Drivetrain› Automatic Transmissions and Components

Billet

252mm Torque Converter with Front Cover

$2,899.00 $2,699.00 Save $200.00

SKU: 07-12H-34

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

Moderate — 2–4 hours

Overview

The Billet 07-12H-34 is a torque converter designed for high-performance applications. It features a 252mm diameter and is constructed with a billet front cover.
Show original supplier description
The Billet 07-12H-34 is a Pro Series torque converter from Circle D Specialties, engineered for high-horsepower applications, capable of handling 800+ HP. This converter is ideal for vehicles equipped with turbochargers, superchargers, or nitrous oxide systems. Key construction features include a billet front cover for enhanced durability, and options for single or triple disk lock-up configurations. It also incorporates anti-balloon plates on the pump and turbine, a CNC-machined steel stator for adjustability, a mechanical diode one-way clutch, and furnace-brazed and hand TIG-welded fins for optimal performance and longevity. The 252mm diameter ensures compatibility with specific GM transmissions. This torque converter is available with multiple bolt pattern front cover options and different stall speed ranges (e.g., 3200-3400 RPM, 3400-3600 RPM), as well as varying lock-up disk configurations. Customers can select between stock and LSA & CDS Flexplate fitment, with different bolt pattern options (3x11.06" or 6x11.06" & 6x11.50").

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

BrandBillet
Part Number07-12H-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.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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