SKU: 65927392316

Fleece Performance FPE-CLNTBYPS-CUMMINS-VP VP Coolant Bypass Kit 1998.5-2002 Fleece Performance

Sale price$170.55 Regular price$189.50
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Ships within 48 hours · Estimated delivery Jul 10 - Jul 15

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Description

Fleece Performance FPE-CLNTBYPS-CUMMINS-VP VP Coolant Bypass Kit 1998.5-2002 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 and up 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.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
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: 65927392316

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Vanessa
Lake Worth, US
★★★★★ 5
Good shoe
Color: Black, Size: 7.5
Comfortable heels true to size they look so good with many different going out outfits. So far they have not broken in half so that’s a plus
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Reviewed in the United States on May 21, 2026
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Lauren Anderson
Fort Morgan, US
★★★★★ 5
Love these shoes!
Color: Tan, Size: 7
Cute style, nice neutral color (exactly like the picture), and surprisingly comfortable too! Heels are wide and not too high.
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Reviewed in the United States on May 14, 2026
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Kathy Schweitzer
Boise, US
★★★★★ 4
Shoe fit
Color: Black, Size: 10
They are very cute and comfy. Just an impulse buy for me. I feally.had no use to wear heels.
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Reviewed in the United States on May 28, 2026
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Alyssa Kennedy
Louisville, US
★★★★★ 5
BUY THESE
Color: Black, Size: 8
Shocked at how comfortable these shoes are. I spend a lot of time standing and moving around as an esthetician. I wore these 8-9 hours straight at work for 2 days and it was shocked at the comfort. They are just right height and cute with long pants. Super cute, I’m so glad i took a chance on these. I bought black and tan
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Reviewed in the United States on May 22, 2026
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Stephanie Price
Massapequa, US
★★★★★ 5
Comfortable
Color: Tan, Size: 6
Very comfortable! I was able to wear these for a long period of time during the day and didn’t give me any issues. True to size. Color is great!
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Reviewed in the United States on June 4, 2026

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