Fleece Coolant Bypass Service Kit (FPE-CLNTBYPS-CUMMINS-SER-KIT) 1994-2024 Cummins 5.9L / 6.7L

$30.86

The Fleece Coolant Bypass Service Kit (FPE-CLNTBYPS-CUMMINS-SER-KIT) is an aftermarket solution for 1994–2024 Cummins 5.9L and 6.7L diesel engines. It improves coolant flow to the rear cylinders, addressing a common cooling issue that can lead to head gasket failure. Designed for durability and easy installation, the kit includes all necessary components and is suitable for daily driving, towing, and performance use. It enhances engine reliability and longevity by equalizing coolant temperatures.

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Description

The Fleece Coolant Bypass Service Kit (FPE-CLNTBYPS-CUMMINS-SER-KIT) is a high-quality aftermarket solution designed for 1994–2024 Cummins 5.9L and 6.7L diesel engines. This kit addresses a common issue in high-performance and heavy-duty applications by improving coolant flow to the rear cylinders, which often suffer from inadequate cooling in stock configurations. By equalizing coolant temperature across the engine, the bypass kit helps reduce the risk of head gasket failure and prolongs engine life. Engineered for durability and ease of installation, the Fleece Coolant Bypass Kit includes all necessary hoses, fittings, and hardware, making it ideal for both daily drivers and performance builds. Whether you’re towing, racing, or simply maintaining your Cummins engine, this service kit offers enhanced reliability and peace of mind.

Additional information
Weight 2.0 lbs
Dimensions 4.0 × 4.0 × 2.0 in
Fitment

Fitment

  • 1994 Dodge Ram 2500/3500 5.9L 12V Cummins
  • 1995 Dodge Ram 2500/3500 5.9L 12V Cummins
  • 1996 Dodge Ram 2500/3500 5.9L 12V Cummins
  • 1997 Dodge Ram 2500/3500 5.9L 12V Cummins
  • 1998 Dodge Ram 2500/3500 5.9L 12V Cummins
  • 1998.5 Dodge Ram 2500/3500 5.9L VP 24V Cummins
  • 1999 Dodge Ram 2500/3500 5.9L VP 24V Cummins
  • 2000 Dodge Ram 2500/3500 5.9L VP 24V Cummins
  • 2001 Dodge Ram 2500/3500 5.9L VP 24V Cummins
  • 2002 Dodge Ram 2500/3500 5.9L VP 24V Cummins
  • 2003 Dodge Ram 2500/3500 5.9L 24V Cummins
  • 2004 Dodge Ram 2500/3500 5.9L 24V Cummins
  • 2005 Dodge Ram 2500/3500 5.9L 24V Cummins
  • 2006 Dodge Ram 2500/3500 5.9L 24V Cummins
  • 2007 Dodge Ram 2500/3500 5.9L 24V Cummins
  • 2007.5 Dodge Ram 2500/3500 6.7L 24V Cummins
  • 2008 Dodge Ram 2500/3500 6.7L 24V Cummins
  • 2009 Dodge Ram 2500/3500 6.7L 24V Cummins
  • 2010 Ram 2500/3500 6.7L 24V Cummins
  • 2011 Ram 2500/3500 6.7L 24V Cummins
  • 2012 Ram 2500/3500 6.7L 24V Cummins
  • 2013 Ram 2500/3500 6.7L 24V Cummins
  • 2014 Ram 2500/3500 6.7L 24V Cummins
  • 2015 Ram 2500/3500 6.7L 24V Cummins
  • 2016 Ram 2500/3500 6.7L 24V Cummins
  • 2017 Ram 2500/3500 6.7L 24V Cummins
  • 2018 Ram 2500/3500 6.7L 24V Cummins
  • 2019 Ram 2500/3500 6.7L 24V Cummins
  • 2020 Ram 2500/3500 6.7L 24V Cummins
  • 2021 Ram 2500/3500 6.7L 24V Cummins
  • 2022 Ram 2500/3500 6.7L 24V Cummins
  • 2023 Ram 2500/3500 6.7L 24V Cummins
  • 2024 Ram 2500/3500 6.7L 24V Cummins
Features

Features

  • Two thermostats are included to service all models of our coolant bypass kit, you will only use one (1) of the included thermostats when replacing your bypass thermostat. This kit does not include the Cummins thermostat. We recommend the use of a Cummins 190° thermostat in the stock location.
  • The kit includes 3 new square cut O-rings, 1 new standard O-ring, and 2 new O-rings for the AN fittings. Depending on the kit you are servicing, not all O-rings will be used.
Installation

Installation

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About brand
Fleece Performance Engineering is a diesel performance manufacturer focused on reliability and precision engineering. The company designs parts that solve common diesel issues while supporting added power. Fleece products support daily driving, towing, and performance diesel trucks. Fleece engineers fuel system components, turbochargers, electronics, and emissions-compliant upgrades in house. Their parts improve efficiency, drivability, and long-term engine protection. Each product is tested for proper fit and consistent performance. Diesel owners trust Fleece for dependable upgrades. Whether maintaining a work truck or building for performance, Fleece delivers proven solutions designed for real-world use.
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