SKU: 64976363296

Fleece Performance FPE-CLNTBYPS-CUMMINS-0305 Cummins Coolant Bypass Kit 2003-2005 Auto Trans Fleece Performance

Sale price$245.70 Regular price$273.00
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Ships within 48 hours · Estimated delivery Jul 28 - Aug 2

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Description

Fleece Performance FPE-CLNTBYPS-CUMMINS-0305 Cummins Coolant Bypass Kit 2003-2005 Auto Trans Fleece PerformanceIncreased 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

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. 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.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 64976363296

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Paige Fontaine
Grantham, US
★★★★★ 5
Nice umbrella! Get it!
Size: 6.5x10ft, Color: Navy, Size: 6.5x10ft, Color: Navy
Really love the umbrella! Covers the table and is made well. At this price, we can buy one every spring.
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Reviewed in the United States on May 16, 2026
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J R Smith
Carnegie, US
★★★★★ 5
Assembly great!
Very good item. Good structure and easy to assemble
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Reviewed in the United States on May 22, 2026
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Leah N. Norton
Pawtucket, US
★★★★★ 5
Easy install!
Works great and easy to install.
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Reviewed in the United States on April 29, 2026
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DKindleReader
Birmingham, US
★★★★★ 5
Nice umbrella stand
This stand is sturdy enough for my 9 ft umbrella. I only used water to fill it so it can be moved if necessary. The umbrella is taken down if it gets too windy as it would be damaged. This would not be the fault of the stand, just the nature of living near the coast.
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Reviewed in the United States on May 1, 2026
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Brenda E. Brown
Cuba, US
★★★★★ 4
The umbrella stand works .
The umbrella stand when filled with water is not as study as I like.
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Reviewed in the United States on April 24, 2026

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