FLEECE FPE-CLNTBYPS-CUMMINS-MAN CUMMINS COOLANT BYPASS KIT 2003-2007 MANUAL TRANSMISSION

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 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.

The 03-07 5.9L automatic transmission version will eliminate the factory transmission fluid heat exchanger. The heat exchanger is not a fluid cooler; it was 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. All 07-13 6.7 trucks, both automatic and manual equipped transmissions, do not have a transmission fluid heat exchanger.

DETAILED FITMENT:

• 2003-2007-Dodge-Ram 3500-Laramie
• 2003-2003-Dodge-Ram 2500-Laramie
• 2003-2007-Dodge-Ram 3500-SLT
• 2003-2004-Dodge-Ram 2500-SLT
• 2003-2007-Dodge-Ram 3500-ST
• 2003-2004-Dodge-Ram 2500-ST
• 2005-2007-Dodge-Ram 2500-Laramie
• 2006-2007-Dodge-Ram 2500-SLT
• 2006-2007-Dodge-Ram 2500-Sport
• 2006-2007-Dodge-Ram 3500-Sport
• 2006-2007-Dodge-Ram 2500-ST
• 2006-2007-Dodge-Ram 2500-TRX4
• 2007-2007-Dodge-Ram 3500-TRX4

  The Fleece Coolant Bypass Kit (FPE-CLNTBYPS-CUMMINS-MAN) is the essential upgrade for your 2003-2007 Cummins equipped with a manual transmission. Designed specifically to address the inherent coolant flow issues faced by the rear cylinders of the 5.9L and 6.7L engines, this innovative kit significantly enhances coolant flow and reduces operating temperatures, improving overall engine reliability and longevity.
  
  Many Cummins engines experience cooling inefficiencies, particularly in the rear cylinders, leading to dangerous pressure build-up within the cooling system. This can cause catastrophic failures, including blown freeze plugs—both externally and under the valve cover. The Fleece Coolant Bypass Kit directly targets this problem with a unique secondary thermostat that operates based on temperature, rather than pressure. This proactive feature ensures consistent coolant temperatures across all cylinders, preventing excessive pressure before it even becomes an issue.
  
  Installation is straightforward, thanks to the complete kit that includes a braided hose and AN O-ring fittings, assuring a leak-free experience. Additionally, models from 2003 onwards come complete with precision-engineered billet hose brackets for a seamless fit.
  
  This kit is particularly impactful for those operating in warm climates or high horsepower applications where the factory transmission fluid heat exchanger becomes redundant. Removing this component does not hinder performance and can further optimize your engine's operation.
  
  Compatible with a variety of Dodge Ram models, including Laramie, SLT, and ST versions from 2003 to 2007, the Fleece Coolant Bypass Kit offers a vital solution to the notorious cooling issues faced by Cummins enthusiasts. Equip your truck with this indispensable kit to ensure stability, reliability, and peak performance on and off the road.