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 12 - Jul 17

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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.
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  • Delivery 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: 65927392316

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4.4 ★★★★★
Based on 358 reviews
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G. Rose
Birmingham, US
★★★★★ 5
Stands up to puppy teeth!
Size: Medium, Size: Medium
I was fostering 2 7-week old puppies that chewed on EVERYTHING! I got these AND a couple of the Kong brand chew toys. These have stood up much better to the puppy teeth than the Kongs did. I throw them in the dishwasher (not every time) and I also have a small straw brush to clean them. They are easy to fill, and once they are done with the treats (PB butter, yogurt, pumpkin, apple sauce etc.), they continue to chew on these. When you throw them, they have a fun bonce. I ended up foster failing one of the puppies, but we still use these often. They still look brand new and I have had them for about 6 months. I got the medium, my dog is about 13 lbs now and the size is perfect for her. The material is strong and I don't hear a peep when she is chewing on it. I would 100% recommend these!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 24, 2026
D
Verified Purchase
Denielle
Carnegie, US
★★★★★ 5
Great toys. Bouncy, chewable long term.
Size: Medium, Size: Medium
We got these for our puppy and to see how they would compare to kongs. Our dogs love these more than the kongs and so far, with two chewy dogs, they have not destroyed these yet. They are very bouncy and provide a lot of chasing fun. We will be buying more and we recommend these.
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Reviewed in the United States on February 28, 2026
L
Verified Purchase
Lynn
Lexington, US
★★★★★ 4
Durable
Size: Large
Excellent material. I wish the hole was a little smaller to keep the treats in better. Also wish they were a little larger and/or oddly shaped so as not to fit under the sofa. Still totally worth it.
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Reviewed in the United States on January 10, 2025
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M Mon
New York, US
★★★★★ 5
Subtle, great dog toy design!
Size: Large
These things are amazing. Stuff them with peanut butter and treats and freeze them of course, but football spike them across the yard to drive your overly hyped dog nuts! And the hole allows you to safely pry it out of a tug battle , just a great design! And it can bobble across a small living space without getting lost like a ball would. Love it!
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Reviewed in the United States on April 20, 2026
A
Verified Purchase
Austin Smith
Natrona Heights, US
★★★★★ 3
Treats fall out way to easy
Size: Large
Kinda sorta awful at holding treats in it, they just fall out without my dog even having to touch it really. I spread peanut butter on the inside of the toy and freeze it..works much better that way, nay, works amazing that way. I got this toy to stimulate his brain, so he’s either much smarter than every other dog or the treats fall out too easy..I believe it’s the ladder.
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Reviewed in the United States on May 26, 2025

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