Mishimoto 2017+ GMC 6.6L Duramax L5P Transmission Thermal Bypass Valve Kit Engine Components~Lifters 5-2010 Chevrolet Silverado 3500

5-2010 Chevrolet Silverado 3500

1997 GMC K3500 Sierra SLT

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

check out the OBS KC300x Stage 2

Mishimoto 2017+ GMC 6.6L Duramax L5P Transmission Thermal Bypass Valve Kit Engine Components~Lifters 5-2010 Chevrolet Silverado 3500The 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