Drivetrain› Automatic Transmissions and Components

Circle D Specialties

245mm Pro Series Torque Converter

$999.00

SKU: 05-10-04-SL

In Stock
In Stock
Ships by Sep 9
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Circle D Specialties 245mm Pro Series torque converter is a performance upgrade for GM 4L80E transmissions. It features a 245mm diameter and is available in stall speeds ranging from 3200 to 4600 rpm.
Show original supplier description
The Circle D Specialties 245mm Pro Series torque converter is a custom-built performance component designed for GM 4L80E automatic transmissions. This converter features a 245mm (9 3/4 inch) diameter and is offered with a wide range of available stall speeds, from 3200 to 4600 rpm, allowing for precise tuning to match your vehicle's specific needs and powerband. Constructed with durability and performance in mind, this converter boasts a furnace-brazed, hand TIG-welded design. Key internal components include Torrington bearings, a billet front, and a billet piston. Buyers can choose from various lock-up options, including non-lockup, single disk lock-up, and a 3-disk lock-up configuration, as well as specialized sprag options like 'Spragless' or 'Mechanical Diode Upgrade' for even greater performance enhancement. Please note that this is a custom-manufactured product with an estimated production lead time of 4-6 weeks.

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 Number05-10-04-SL
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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