SKU: 27413499520

Fleece Performance 03-07 Dodge 5.9L / 04.5-12 6.7L Cummins Coolant Bypass Kit (03-07 Manual Trans)

Sale price$175.39 Regular price$194.88
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Ships within 48 hours · Estimated delivery Jul 17 - Jul 22

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Description

Fleece Performance 03-07 Dodge 5.9L / 04.5-12 6.7L Cummins Coolant Bypass Kit (03-07 Manual Trans)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

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. 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.

Installation Instructions
Warranty
  • Complete kit comes with braided hose and AN O-ring fittings to ensure a leak-free installation
  • Ensures consistent temperatures across all cylinders
  • Lowers coolant temperature at the rear cylinders
  • Prevents damaging coolant pressure build up

This Part Fits:

Year Make Model Submodel
2003,2005-2007 Dodge Ram 2500 Laramie
2003-2007 Dodge Ram 2500 SLT
2006 Dodge Ram 2500 Sport
2003-2007 Dodge Ram 2500 ST
2006-2007 Dodge Ram 2500 TRX4
2003-2007 Dodge Ram 3500 Laramie
2003-2007 Dodge Ram 3500 SLT
2006-2007 Dodge Ram 3500 Sport
2003-2007 Dodge Ram 3500 ST
2007 Dodge Ram 3500 TRX4
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
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  • Delivery 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]
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SKU: 27413499520

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Christy Almquist
Omaha, US
★★★★★ 5
Good if they fit
Special Size: Midweight, Size: 30W x 30L, Color: Dark Midnight Wash
The jeans are great, once I got the right size, but these I brought back to Whole Foods and got charged anyway because Amazon never got them back!! But cheaper than Levi’s
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 22, 2026
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Emmamom
Whiting, US
★★★★★ 4
Important fit information
Special Size: Midweight, Size: 34W x 30L, Color: Tinted Medium Blue
Be aware that these jeans are loose fit, not fitted through hips and thighs. Excellent quality, well made, great value. But if you are not overweight, if you have a trim build you will NOT like these. They were very baggy and loose around my husband's butt and thighs, so we had to return them. However, if you have a more generous build under your size 34 waist you WILL like these, and the waist has some stretch. I removed one star for calling these fitted through hips and thighs. They're not.
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Reviewed in the United States on April 8, 2026
G
Verified Purchase
G.P. CEPENAS
Birmingham, US
★★★★★ 5
Great fit and value for quality jeans
Special Size: Midweight, Size: 42W x 30L, Color: Tinted Medium Blue
For once I bought a pair of jeans that are super comfortable and feel like I’ve had them for years I had to return for a shorter size which was no problem and they now fit perfect Very good quality material like Levi’s or Wranglers not like inferior substitutes Great value for a quality product
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Reviewed in the United States on March 8, 2026
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Verified Purchase
David Hamlin
Massapequa, US
★★★★★ 5
Good
Special Size: Midweight, Size: 40W x 30L, Color: Tinted Medium Blue
The length runs long. The waist fits good
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Reviewed in the United States on May 2, 2026
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Verified Purchase
Steve
San Leandro, US
★★★★★ 3
Couldn't get the zipper button open!
Special Size: Midweight, Size: 38W x 30L, Color: Dark Midnight Wash
Returned. They are probably a good product but I have arthritis in my thumbs and it was excruciating to try to undo the button above the fly. I seemed like like the button hole was too small. Maybe a gorilla finished final assembly?
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Reviewed in the United States on May 5, 2026

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