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 Aug 10 - Aug 15

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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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Crystal Atwood
Omaha, US
★★★★★ 5
The Caddy fulfills it's duty
Color: Black, Size: Medium
This caddy turns out to be everything I hoped it would. So often I'll purchase an item and it turns out to be cheaply made or wonky. But this 2-Tier Kitchen Sink Caddy fulfilled it's mission and cleaned up my sink area. Everything is handily stored in it's compartments.
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Reviewed in the United States on May 27, 2026
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Suki
Pawtucket, US
★★★★★ 5
Good product.
Color: Black, Size: Medium
Convenient & looks nice. Very functional. Enough space for cleaning stuff. Good product. Thanks.
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Reviewed in the United States on April 25, 2026
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JB
Cuba, US
★★★★★ 5
Recommend
Color: Black, Size: Medium
Fits perfect, great organizer, looks great. Great value.
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Reviewed in the United States on April 12, 2026
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Z
Lowell, US
★★★★★ 3
Be careful of sharp edges
Color: Silver, Size: Medium, Color: Silver, Size: Medium
This is a decent organizer for the kitchen. Not too big and not too small for what I have. I like how it has two tiers so I can put soap bottles on top and sponges underneath. I also like that it just stands on the rounded edges instead of having legs. Those can start looking a little gross over time. I’m not sure if it’s just the one I bought, but you do want to be careful. Some of the welded parts had metal sticking up that I had to hammer down. The drain plate has some sharp edges. Not as sharp as a knife, but sharp enough you might cut yourself. I have another one from a different seller and just one tier, but it has a similar drain plate. That one has slightly rounded edges compared to this one. I would have like it more if the top basket was slightly taller. I get scared the glass soap dispensers I have might get knocked over easily. It would also be nice if the bottom could have a bit weight to it to avoid tipping. Overall, I would still recommend this over a single basket if you have more items you want to hold.
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Reviewed in the United States on October 30, 2025
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SmartLady
Lexington, US
★★★★★ 5
Would buy again and again
Color: Black, Size: 35.4 Inches
These are beautiful! I thought they’d be hard to install, but very straightforward and easy. They are quality and sturdy. I staggered the shelves and they hold a lot. Great value for the quality. I will be buying more for another room in the house.
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Reviewed in the United States on March 10, 2026

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