Billet Transmission Adapter With 6AN Gasket And Fittings For 6L80E 6L90E 8L90E
Upgrade your automatic transmission cooling setup with this billet adapter plate engineered specifically for the GM 6L80E, 6L90E, and 8L90E eight-speed units. Machined from solid billet stock, it replaces restrictive factory passages and offers 6AN fittings for routing high-flow aftermarket cooler lines. The accompanying gasket guarantees a secure, leak-free seal under heavy load, making it a dependable solution for performance builds, towing applications, or track days where consistent fluid temperatures are critical.
Benefits & Tips
- Combine this adapter with a compatible 6AN line kit to maximize heat rejection during repeated downshifts or extended highway driving.
- Torque the mounting bolts evenly in a cross pattern to maintain flat surface contact and preserve the integrated gasket seal.
- Clean mating surfaces thoroughly before installation to prevent gasket pinching and ensure optimal heat transfer from the transmission case.
Product Specifications
- Transmission Compatibility: 6L80E, 6L90E, 8L90E
- Construction: CNC billet design
- Fitting Type: Integrated 6AN outlets
- Sealing: Dedicated transmission cooler line gasket included
- Reference Designation: 551121-6AN
Package Includes
- 1 × Billet Transmission Cooler Line Adapter Plate
Warnings & Reminders
Verify vehicle build codes before purchase, as subtle casting variations exist across production runs. Manufacturing batches ship interchangeably between updated and legacy configurations; measure your existing cooler mounting space to confirm physical clearance. When uncertain about thread pitch or flange style, consult our support staff with your transmission tag number prior to completion of the order.
All electronic and mechanical equipment, devices and machines sold by InterCyprus to EU countries are CE certified and carry a two year warranty.
Supplying precision components and reliable service across the European market since 2002 via intercyprus.com.