Drivetrain› Automatic Transmissions and Components

Circle D Specialties

298mm HP 4L60 LT Torque Converter

$799.00

SKU: 02-07-08-ASK

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 GM 298mm HP 4L60 LT Torque Converter is a custom-manufactured performance torque converter designed for enhanced power transfer. It features a 298mm (11-inch) diameter and is available with stall speeds ranging from 1800 to 2400 RPM. The construction includes hand TIG welding for durability, a high carbon spun wound lock-up clutch lining, and heavy-duty Torrington bearings. Its flanged hub design provides anti-flex durability.
Show original supplier description
The Circle D Specialties GM 298mm HP 4L60 LT Torque Converter is a custom-built performance upgrade for automatic transmissions. This converter features a 298mm (11-inch) diameter and is engineered for applications including 5.7 vortech trucks, LT1 Impala SS, LT1 F-Body, and LT1 Corvette. Constructed with precision, this torque converter boasts hand TIG welding for superior strength and longevity. It utilizes a high carbon spun wound lock-up clutch lining for reliable engagement and heavy-duty Torrington bearings for smooth operation under load. The flanged hub design enhances durability by preventing flex, ensuring consistent performance. Available with customizable stall speeds from 1800 to 2400 RPM, this converter can be tailored to your specific performance needs. It is designed to fit 700R4 transmissions with a 30-spline input shaft; for 27-spline applications, direct contact with Circle D Specialties is recommended. As a custom-manufactured product, please note a lead time of 4-6 weeks for production. This torque converter is an ideal choice for enthusiasts seeking to maximize the performance potential of their GM vehicles equipped with 4L60 or LT transmissions.

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 Number02-07-08-ASK
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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