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Drivetrain› Automatic Transmissions and Components

Circle D Specialties

Torque Converter with Billet Stator

Name: Torque Converter with Billet Stator
Brand: Circle D Specialties
SKU: 258mm HP Series

$1,299.99 $1,099.00 Save $200.99

SKU: 258mm HP Series

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$100 Minimum Order

Non-Returnable Item

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Moderate — 2–4 hours

Description

The Circle D Specialties 258mm HP Series torque converter is engineered to enhance the performance of late-model GM vehicles that utilize the 8L90 transmission. This unit features a 258mm diameter, offering a balance between drivability and performance gains. This modification allows the engine to reach higher RPMs before the torque converter fully locks up, leading to improved acceleration and power delivery, particularly from a standstill or during aggressive driving. As a high-performance upgrade, the 258mm HP Series converter is intended to replace the factory torque converter, offering a more robust and capable solution for enthusiasts seeking to optimize their vehicle's drivetrain. It is an ideal choice for those looking to leverage the full potential of their 8L90-equipped GM vehicle.

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

Brand	Circle D Specialties
Part Number	258mm HP Series
Category	Drivetrain

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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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