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Vivid Racing Gear 
FPE-CLNTBYPS-CUMMINS-VP-SS | Fleece Performance Cummins Coolant Bypass Kit VP 98.5-02 with Stainless Steel Braided Line
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 and up 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. It is not necessary for use in warm climates or high horsepower applications, nor does it detrimentally affect the trucks performance when removed.
For model years 2007 - 2018 6.7L trucks, including both automatic and manual equipped transmissions, factory installed transmission fluid heat exchangers are uncommon. For customers with a 6.7L that has a heat exchanger, a heater tube can be purchased at your local Chrysler Dealership [PN:68048997AA] to complete the installation.
Features:
- VP Coolant Bypass Kit (1998.5-2002) with Stainless Steel Braided Line
- Engine Manufacturer: Cummins
- Engine Year: 1998.5-2002
- Liter: 5.9 Liter, 6.7 Liter
- Sold As: Kit
Other Part Numbers:
Fleece Performance #FPE-CLNTBYPS-CUMMINS-VP-SS-FQWW
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov
Fleece Performance is an aftermarket company established in 2008 in North Salem, IN, by Brayden and Chase Fleece. The company is known for manufacturing performance parts for various diesel engines. Today, Fleece Performance is the leading brand in the market when it comes to diesel aftermarket parts.
Diesel Performance Parts ExpertsThe company’s founders Brayden and Chase, are fellow enthusiasts themselves. They decided that they wanted to improve the products already existing in the market. Using their vehicle as their product’s testbed, they created some of the best parts available today. As a result, they have established a reputation as a brand that provides innovative products that pushed the limits of diesel performance technology.
Quality Made ProductsThe company offers a wide range of turbochargers, AN Fittings, Fuel system parts, and cylinder head kits. They cater to a variety of automotive brands such as Ford, Dodge, and Chevy. Each product is carefully designed to produce optimum performance and is developed, assembled, and tested in their in-house facility.
The company received its ISO certification in 2020, which shows that the company adheres to the strict standard set by the regulators.
Purchase Fleece Performance Products At Vivid RacingIf you are in the market for high-quality diesel performance parts, then Fleece Performance is the brand for you. They have been manufacturing quality parts for more than ten years and has gained the trust of many diesel enthusiast and racers alike. To know more about Fleece Performance, visit Vivid Racing and check out their list of products that fit your specific need.
LIMITED WARRANTY ON NEW FLEECE PERFORMANCE ENGINEERING PRODUCTS (US AND CANADA ONLY)
Fleece Performance Engineering will provide for repairs or replacement, at its option, during the warranty period of each new product model listed on page 2 in accordance with the following terms, conditions, and limitations: View HERE