Fleece Performance fpeFPE-CLNTBYPS-CUMMINS-VP-SS - 98.5-02 VP Coolant Bypass Kit with Stainless Steel Braided Line

Increased Coolant Flow, Decreased Coolant Temperatures 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. Benefits: Lowers coolant temperature at the rear cylinders Ensures consistent temperatures across all cylinders Prevents damaging coolant pressure build up 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. Why do I need a Fleece Coolant Bypass? 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 Notes: 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.

• Complete kit comes with braided hose and AN O-ring fittings to ensure a leak-free installation
• Ensures consistent temperatures across all cylinders
• Lowers coolant temperature at the rear cylinders
• Prevents damaging coolant pressure build up

The Fleece Performance 98.5-02 VP Coolant Bypass Kit with Stainless Steel Braided Line addresses the reduced coolant flow experienced by the rear cylinders on 5.9L Cummins engines. By adding a secondary thermostat that operates according to temperature rather than excessive pressure, the kit helps maintain more consistent coolant temperatures across all six cylinders and reduces the risk of damaging pressure buildup.

The complete kit includes a braided hose and AN O-ring fittings designed to support a leak-free installation. For 2003-2007 5.9L automatic transmission applications, installation eliminates the factory transmission fluid heat exchanger, which is designed to warm transmission fluid with engine coolant in cold climates.

Key Features & Performance Benefits

• Secondary thermostat operation: Responds to temperature to help manage coolant flow before excessive pressure becomes an issue.
• Improved rear-cylinder cooling: Helps lower coolant temperatures at the rear cylinders.
• Consistent cylinder temperatures: Promotes more even temperatures across all six cylinders.
• Pressure control: Helps prevent damaging coolant pressure buildup that can contribute to freeze plug failure.

Key Product Specifications & Technical Data

• Brand: Fleece Performance
• Part number: fpeFPE-CLNTBYPS-CUMMINS-VP-SS
• Product type: Coolant bypass kit
• Application: 5.9L Cummins VP applications
• Application range: 1998.5-2002
• Line type: Stainless steel braided line
• Fitting type: AN O-ring fittings
• Thermostat operation: Temperature-based secondary thermostat

What's Included in the Box

• Braided hose
• AN O-ring fittings

Fitment

Fits 1998-2002 Dodge Ram 2500 and 1998-2002 Dodge Ram 3500 applications.

Fitments:
1998 Dodge Ram 2500 Base
1998 Dodge Ram 3500 Base
1999 Dodge Ram 2500 Base
1999 Dodge Ram 3500 Base
2000 Dodge Ram 2500 Base
2000 Dodge Ram 3500 Base
2001 Dodge Ram 2500 Base
2001 Dodge Ram 3500 Base
2002 Dodge Ram 2500 Base
2002 Dodge Ram 3500 Base

Air Freight Prohibited: false
Not Carb Approved: true
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: t
Units Per Sku: 1