Drivetrain› Automatic Transmissions and Components

Circle

258mm Pro Series Torque Converter

$1,499.00

SKU: 23-13-05-1DX

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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 Circle D 258mm Pro Series torque converter is designed for late-model 8L90 equipped GM vehicles. It offers a stall speed range of 3200-3400 RPM.

Key features include a billet front cover, triple clutch lockup, and a billet apply piston. It also incorporates heat-treated steel splines, furnace brazed and TIG-welded fins, and a flanged style hub. This torque converter is specifically for the 8L90E transmission in C7 Corvettes.
Show original supplier description
The Circle D 258mm Pro Series torque converter is an excellent choice for late-model GM vehicles equipped with the 8L90 transmission, particularly when aiming to maximize boosted performance. This converter is engineered for the 8L90E transmission found in C7 Corvettes, offering a stall speed range of 3200-3400 RPM. Constructed with premium materials and advanced techniques, this torque converter boasts several key features. It includes a robust billet front cover and a billet apply piston for enhanced durability. The triple clutch lockup system ensures efficient power transfer, while heat-treated steel splines provide superior strength. Additionally, furnace brazed and hand TIG-welded fins contribute to its overall reliability and performance under demanding conditions. A flanged style hub is also incorporated for secure mounting.

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
Part Number23-13-05-1DX
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.

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