Mishimoto 03-07 Dodge Ram 5.9L Cummins Replacement Transmission Cooler Exhaust- Mufflers & Tips>Catalytic Converter Direct Fit We are here to win

We are here to win

67% greater flow area compared to stock

Department of Transportation) certification and SAE (Society of Automotive Engineers) certification requirements making legal for street use

3 Liter FS5R30A

Mishimoto 03-07 Dodge Ram 5.9L Cummins Replacement Transmission Cooler Exhaust- Mufflers & Tips>Catalytic Converter Direct Fit We are here to winThe factory transmission oil cooler on your 2003 2007 Dodge Ram 5. 9L Cummins is a liquid to liquid cooling unit, utilizing the engine's cooling system to cool the transmission fluid during warm outside temperatures and warm the fluid during cold outside temperatures. This design is tried and true, and it works. Until it doesn't. When they wear out and fail, it can leak coolant into your transmission fluid. Mixing coolant into your transmission fluid