Mishimoto 2017+ GMC 6.6L Duramax L5P Transmission Thermal Bypass Valve Kit Engine Components~Lifters check out the OBS KC300x

check out the OBS KC300x Stage 2

A bolt gets twisted as it is tightened

Includes a 3-1/2 inch constant-diameter Boost Tube to flow air from the intercooler without restriction

1989 Chevrolet V3500 Scottsdale

2000 AM General Hummer Base

Mishimoto 2017+ GMC 6.6L Duramax L5P Transmission Thermal Bypass Valve Kit Engine Components~Lifters check out the OBS KC300xThe 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