6L80 / 6L90 / 8L90 Thermostat Bypass Valve Kit (2014+)

Precision Machined in USA

Free shipping on orders over $100

Kit includes 1 valve, and 3 Viton O-rings

Eliminate thermal restriction and improve fluid flow with our precision-machined thermostat bypass valve.

Designed for 2014+ GM 6L80, 6L90 and 8L90 transmissions, this kit replaces the factory thermostat assembly to allow unrestricted fluid circulation.

Each component is CNC machined in-house from 6061 aluminum for strength, durability, and precise fitment.

Viton O-rings are included for reliable sealing and long service life.

Features

• Compatible with 6L80, 6L90, and 8L90 thermostat housings
• CNC machined in-house for precision and consistency
• Constructed from 6061 aluminum
• Viton O-rings included
• Direct replacement installation

What It Does

The factory transmission thermostat can restrict fluid flow under certain conditions.
This bypass valve eliminates that restriction, allowing consistent transmission fluid circulation.

Ideal for performance builds, towing applications, and high-heat environments.