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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Ships within 48 hours · Estimated delivery Sep 16 - Sep 21

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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
  • 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: 80894128704

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Osmara
Chelsea, US
★★★★★ 5
Perfect UV Protection and Comfort for Outdoor Activities
Color: Mist Green, Size: Medium
I recently purchased this UV long sleeve shirt for outdoor activities, and I'm extremely satisfied with my choice. It offers excellent UV protection with a UPF rating of 50+, keeping me safe while at my sons soccer game. The lightweight, breathable fabric kept me cool and comfortable, and its moisture-wicking properties worked well. The fit is was a little flowy. While it is slightly pricier than other options, the quality and performance make it worth the investment. I highly recommend this shirt for anyone seeking a stylish and functional solution for outdoor adventures!
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Reviewed in the United States on May 28, 2025
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Dee K.
Pawtucket, US
★★★★★ 5
Ideal fabric, great fit.
Color: Light Pink, Size: Medium
Loose fitting back is ideal for hiking, walking and other outdoor activities. The fabric is breathable - great for working out. Even though the back if loose fitting, the front and boatneck fit well.
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Reviewed in the United States on May 20, 2026
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B Sieling
Natrona Heights, US
★★★★★ 5
Prefect coverage and cooling.
I have to have sun protection and I live in the south. This is perfect for my daily walks. Covers what I don’t want to put sun screen on, the loose fit hides tummy area and loose in back. Liked it so much, I just ordered two more. Soft, silky, and Very cooling and lightweight.
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Reviewed in the United States on March 26, 2026
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Diane G
Louisville, US
★★★★★ 3
Weird spot on it.
Color: Black, Size: Large
I kind of like this top, especially the feel of it. Unfortunately, it has an odd stain on the front. Looks like a heat mark from being pressed? I hope it comes out because I threw the bag away. If it does come out I'll take down this review.
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Reviewed in the United States on May 29, 2026
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Edith J. Dutcher
New York, US
★★★★★ 4
Shirt
Color: Aqua Blue, Size: Small
Good quality and nice material.
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Reviewed in the United States on January 29, 2026

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