Drivetrain› Automatic Transmissions and Components

Circle D Specialties

258mm Pro Series 8L90 Torque Converter

$1,429.00

SKU: 23-13-05

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 258mm Pro Series 8L90 Torque Converter is designed for late-model GM vehicles equipped with the 8L90 transmission. This torque converter features a triple clutch lockup and a billet apply piston for enhanced performance. It also includes heat-treated steel splines and furnace brazed/hand TIG welded fins.
Show original supplier description
The Circle D Specialties 258mm Pro Series 8L90 Torque Converter is an excellent choice for late-model GM vehicles looking to maximize boosted performance. This converter is built with a billet front cover, a triple clutch lockup system, and a billet apply piston for durability and improved power transfer. It features heat-treated steel splines for strength and furnace brazed/hand TIG welded fins for reliability under demanding conditions. The flanged style hub ensures a secure connection. This Pro Series converter is specifically designed for the 8L90 transmission. However, it is crucial to note that this converter WILL NOT FIT 2019+ L84 applications. For 2019+ L84 Sierra/Silverado owners, a specific linked product is available. Additionally, C7 Corvette owners must select their specific application from the provided dropdown menu. The converter is available with various stall speed options, ranging from 'Ask CDS' to 3600-3700 RPM, and in different bolt patterns including Stock (6x11.50") and 2015+ C7 Corvette (6x9.2").

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 Number23-13-05
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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