Mishimoto 2017+ GMC 6.6L Duramax L5P Transmission Thermal Bypass Valve Kit Cummins 6.7 from 350 to 550 flywheel

from 350 to 550 flywheel horsepower

One-piece forged OEM stock length

2005 Chevrolet Avalanche 2500 LT

Knurled For Hand Removal and Installation

2007 Toyota Highlander Base

Mishimoto 2017+ GMC 6.6L Duramax L5P Transmission Thermal Bypass Valve Kit Cummins 6.7 from 350 to 550 flywheelThe Allison transmission is the backbone of your L5P Duramax. It's responsible for transmitting large quantities of torque from your V8 diesel powerplant. This torque generates a lot of heat, and if that heat isn't dissipated, it can destroy your transmission. The transmission cooler does a good job of keeping trans fluid temperatures in check, but only if the fluid can reach it. The stock cooling system of the Allison 1000 transmission utilizes an in