Mishimoto Transmission Thermal Bypass Valve Kit 17-19 GM 6.6L Duramax L5P AMP-75300-01A you can have confidence these

you can have confidence these will last you as long as your original pump

Mag-Hytec designed the cover with external cooling fins to get rid of heat fast

The objective is to provide the absolute lowest exhaust gas temperatures

Being manufactured from extruded 6061 aluminum

Mishimoto Transmission Thermal Bypass Valve Kit 17-19 GM 6.6L Duramax L5P AMP-75300-01A you can have confidence theseAre you wanting the best performance out of your Transmission? The 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