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 31 - Aug 5

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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
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Exchange/Return Notes
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  • Final sale items are not eligible for returns or exchanges.
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SKU: 27413499520

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Lynn
Louisville, US
★★★★★ 5
Best wallet ever!!
Color: Brown (Trifold)
Got this for my dad for Xmas. He’s the pickiest person ever with wallets. He’s had the same one since I was in elementary school. He likes the trifold heavy duty wallets so I thought I’d give this a try and he has been using it ever since! He really likes the quality and durability and trifold in this wallet. Super secure and the leather is nice. Lots of card capacity and isn’t too thick
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Reviewed in the United States on February 12, 2026
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sean simmons
Phoenix, US
★★★★★ 5
Heavy duty wallet.
Color: Black (Trifold)
Wow, this wallet is heavy duty thick leather with fantastic stitching. Will last a long time, very durable for a work wallet. The leather is smooth and fits well in the back pocket. A wallet for a man, not a boy.
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Reviewed in the United States on February 9, 2026
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Kindle Customer
Lexington, US
★★★★★ 5
Great wallet
Color: Black (Trifold)
He liked it
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Reviewed in the United States on May 31, 2026
M
Verified Purchase
Mariu Del Villar
Lexington, US
★★★★★ 5
Wallet
Color: Brown (Trifold)
Excellent material and very durable, a very necessary gift for my husband, he loved it
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Reviewed in the United States on May 2, 2026
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Verified Purchase
scott deignan
Chelsea, US
★★★★★ 5
great wallet
Color: Brown (Trifold)
bought this a few years ago and its lasted its well built has lots of spots for id and credit cards worth the momey
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Reviewed in the United States on January 19, 2026

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