94-98 Ram 2500 / 3500 5.9L Cummins 12V Fleece Coolant Bypass Kit FPE-CLNTBYPS-CUMMINS-12V

Coolant Bypass Kit Features:

• Lowers coolant temperature at the rear cylinders
• Prevents coolant cavitation
• Ensures consistent temperatures across all cylinders
• Complete kit comes with braided hose and AN O-ring fittings to ensure a leak-free installation. Kits for MY 2003+ include billet hose brackets.
• Improves engine warm up time
• Enhances performance

Improve Your Rig's Overall

The rear cylinders on the 5.9/6.7L Cummins suffer from a lack of coolant flow, and therefore, experience the highest coolant temperatures. This can cause excessive pressure to build in the cooling system, especially the rear of the block and blow out freeze plugs externally, or the smaller diameter plugs under the valve cover, leading to a failure. Our coolant bypass kit adds a secondary thermostat, that unlike other brands, works based on temperature instead of excessive pressure. This solves the problem before pressure becomes an issue by ensuring consistent temperatures across all six cylinders. One of the biggest issues on the 5.9/6.7L Cummins is the coolant flow problem to the rear cylinders. This can cause catastrophic failure or blow outs of the freeze plugs in an over-temperature / over-pressure condition. The Fleece Coolant Bypass is one of the most important additions you make to improve the reliability and longevity of the Cummins platform.

Application Note: The 2003 - 2007 5.9L automatic transmission version will eliminate the factory transmission fluid heat exchanger. The heat exchanger is designed for use in cold climates to warm the transmission fluid with the engine coolant. It is not necessary for use in warm climates or high horsepower applications, nor does it detrimentally affect the trucks performance when removed.

Application Note: For model years 2007 - 2018 6.7L trucks, including both automatic and manual equipped transmissions, factory installed transmission fluid heat exchangers are uncommon.

Vehicle Fitment: 1994-1998 Dodge Ram 2500/3500 5.9L Cummins 12V

Emissions Note: This product is covered under CARB EO# D-834-9 for street-legal functionality in all 50 States.