Circle D HP Series 8L90 258mm Factory Replacement Torque Converter
CIRCLE D SPECIALTIES
Circle D HP Series 8L90 258mm Factory Replacement Torque Converter
The Circle D HP Series 8L90 258mm Torque Converter is a direct factory replacement for failure-prone OEM 8L90 converters. Featuring a billet front cover, triple-disc lockup clutch, billet apply piston, and reinforced internal components, it delivers improved durability for high-performance street and track applications while retaining the factory 6 x 11.50" bolt pattern.
Key Features
- Direct replacement 258mm 8L90 torque converter
- Factory 6 x 11.50" flexplate bolt pattern
- Billet front cover and billet apply piston
- Triple-disc lockup clutch
- Heat-treated splines and furnace-brazed, TIG-welded fins
- Optional stall speed upgrades available (HP Tuners calibration required)
Fitment
- GM 8L90-equipped applications using the factory 6 x 11.50" bolt pattern
Important Notes
- Will not fit 2019+ GM L84 applications.
- Will not fit C7 Corvette applications.
- HP Tuners calibration is required when selecting a non-stock stall speed.
Note: Verify transmission and flexplate compatibility before ordering.