Fleece Performance 03-07 Manual Transmission Cummins Coolant Bypass Kit w/ SS Braided Line
SKU: 80894128704

Fleece Performance 03-07 Manual Transmission Cummins Coolant Bypass Kit w/ SS Braided Line

Sale price$175.39 Regular price$194.88
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Description

Fleece Performance 03-07 Manual Transmission Cummins Coolant Bypass Kit w/ SS Braided LineIncreased 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
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Exchange/Return Notes
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SKU: 80894128704

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NDA
Massapequa, US
★★★★★ 4
Overall ok
Size: Small, Color: Light Gray, Size: Small, Color: Light Gray
I purchased this for my son for homecoming. 6’, 170, size S. The pants fit well, the jacket is kind of boxy. If you’re looking for a more slim fit on jacket, this is not it. It was too late for us to get anything else. Overall, it was fine. The sleeves At wrist not as crisp. I had to really press to give crisp shape. I steamed the heck out of it. My son was OK with it. Holds up well for one time use. Color was what we wanted.
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Reviewed in the United States on November 11, 2025
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ANDER
Massapequa, US
★★★★★ 5
Good
Size: Medium, Color: Champagne
Nice
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Reviewed in the United States on May 17, 2026
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A
Dallas, US
★★★★★ 5
Best bang for your buck
Size: Large, Color: Navy Blue
Highly recommend this suit if you’re looking for the best bang for your buck! We did go with another option, but upon receiving the suit, I will definitely keep this seller in mind for other occasions! Do wish you could mis-match the pants and blazer sizes, but still a great option if you can fit the top and bottom together! Even adjusting bigger sizes with a tailor, still cheaper than most options while not appearing as cheap as it is! Also ordered the champagne color, very admirable as well!
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Reviewed in the United States on May 27, 2025
S
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sheldon phillips
Houston, US
★★★★★ 2
Pants size
Size: X-Large, Color: Champagne
The pants are too small for an XL size.
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Reviewed in the United States on September 23, 2025
J
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JMommy
Battle Creek, US
★★★★★ 5
Great vest
Size: 12, Color: Black
Great vest. I love the slim fit. It looks very nice on my son, not baggy or boxy looking like some vest. My son has used it for several occasions including a wake, a Beta Club induction, awards day, and soon his graduation celebration at church. The quality and material are good. Definitely worth what I paid.
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Reviewed in the United States on May 29, 2026

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