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Drivetrain› Automatic Transmissions and Components

Circle D Specialties

Pro Series 258mm Torque Converter

$2,995.00 $2,795.00 Save $200.00

SKU: 46-18-05

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In Stock
Ships by Sep 9
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$100 Minimum Order
30 Days Return
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Overview

The Circle D Specialties Pro Series torque converter is a 258mm unit designed for high horsepower 2018+ Ford Mustang and F-150 applications. It features a billet steel construction with a 5-axis billet steel stator and a modular clutch pack assembly capable of holding over 2000 lb-ft of torque. The fins are furnace brazed and hand TIG welded for durability.
Show original supplier description
The Circle D Specialties Pro Series 258mm Torque Converter is engineered for high-horsepower 2018 and newer Ford Mustang GT and F-150 vehicles, particularly those with forced induction setups like turbochargers or positive displacement superchargers. This converter is built with robust materials, including a billet steel front cover and a 5-axis CNC-machined billet steel stator. Its construction is further reinforced by furnace brazed and hand TIG welded fins, ensuring exceptional durability under demanding conditions. This specific Pro Series model offers a customizable stall speed option, with the selected configuration ranging from 4400-4600 RPM, paired with the ability to handle forced induction applications. It boasts a modular clutch pack assembly with clutch pack isolators, rated to hold over 2000 lb-ft of torque. Additional features include a CFD-modeled stator, exclusive deep groover ball bearings, and a patent-pending flow control piston design. The "Vehicle Applications" section confirms fitment for 2018-2026 Ford F-150, 2024-2026 Ford Mustang Dark Horse (including SC variants), and 2018-2026 Ford Mustang GT models. It's important to note that this product is custom manufactured, with a lead time of 4-6 weeks, and is built to accommodate a wide variety of engine and power-adder setups while aiming to retain pleasant street driving characteristics.

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 Number46-18-05
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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