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by Fleece
Original price $359.00 - Original price $359.00
Original price
$359.00 - $359.00
Current price $359.00
The Fleece FPE-CLNTBYPS-CUMMINS-VP Coolant Bypass Kit is a must have on any 1998.5-2002 Dodge 5.9L Cummins engine. The Cummins engine cooling system was designed to adequately cool a 300-350hp engine. When horsepower is increased there is also an increased demand on the cooling system. The rear cylinders suffer from a lack of coolant flow, and therefore, experience the highest coolant temperatures. This can cause excessive pressure to build in the system, especially the rear of the block and possibly blow out freeze plugs externally, or the smaller diameter plugs under the valve cover, leading to a failure.

The Fleece Performance Coolant Bypass Kit is designed with 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. This kit comes complete with high quality O-ring fittings and AN hose connections with your choice of braided nylon or braided stainless steel hose to ensure a leak free installation.


Includes Secondary Thermostat
Eliminates Higher Temps In Rear Of Engine
Head Removal Not Required For Installation
Regulated Coolant Temps Across Entire Engine
Available with Braided Black Nylon or Braided Stainless Steel Hose
1 Year Limited Warranty