SKU: 87563340547

2003-2005 Ram HD Coolant Bypass Kit 003-05 Auto Trans with Stainless Steel Braided Line (FPE-CLNTBYPS-CUMMINS-0305-SS)

Sale price$180.45 Regular price$200.50
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Description

2003-2005 Ram HD Coolant Bypass Kit 003-05 Auto Trans with Stainless Steel Braided Line (FPE-CLNTBYPS-CUMMINS-0305-SS)The Fleece Performance Cummins Coolant Bypass Kit 003 05 Auto Trans with Stainless Steel Braided Line is built to OEM or better standards for diesel truck owners who want a no compromise upgrade. Engineered, manufactured, and supported by Fleece the diesel performance specialists. Features Lowers coolant temperature at the rear cylinders Ensures consistent temperatures across all cylinders Prevents damaging coolant pressure build up Complete kit comes

The Fleece Performance Cummins Coolant Bypass Kit 003-05 Auto Trans with Stainless Steel Braided Line is built to OEM-or-better standards for diesel truck owners who want a no-compromise upgrade. Engineered, manufactured, and supported by Fleece - the diesel performance specialists.

Features
  • 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.
  • The 2003 - 2007 5.9L automatic transmission version will eliminate the factory transmission fluid heat exchanger. The heat exchanger is 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.
  • For model years 2007 - 2018 6.7L trucks, including both automatic and manual equipped transmissions, factory installed transmission fluid heat exchangers are uncommon. For customers with a 6.7L that has a heat exchanger, a heater tube can be purchased at your local Chrysler Dealership [PN:68048997AA] to complete the installation.
Specifications
  • Fuel Type: Diesel
  • Engine: 5.9L / 6.7L Cummins
  • Transmission: Automatic
  • Country of Origin: US
Manufacturer Description

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.

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.
Application Notes:

  • The 2003 - 2007 5.9L automatic transmission version will eliminate the factory transmission fluid heat exchanger. The heat exchanger is 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.
  • For model years 2007 - 2018 6.7L trucks, including both automatic and manual equipped transmissions, factory installed transmission fluid heat exchangers are uncommon. For customers with a 6.7L that has a heat exchanger, a heater tube can be purchased at your local Chrysler Dealership [PN:68048997AA] to complete the installation.
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: 87563340547

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4.3 ★★★★★
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Verified Purchase
Terri
Lexington, US
★★★★★ 5
Yummy
Color: GT-2P
Dogs love them
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 3, 2026
C
Chris S.
Lowell, US
★★★★★ 5
Not indestructible, but well worth it
Color: GT-2P, Color: GT-2P
First things first…it’s solid, literally. Very hard and if you have tile or wood floors, it’s ridiculously loins when it hits the floor. With that said, we’ve had our dogs chewing on these for about a month now. All 3 are aggressive chewers. As you can see in my pic, there are signs of chewing on the ends of the bone. I’ve noticed they all seem to gravitate towards them assuming they think they can chew through it. Not the case. The material itself made of is hard but I almost think they enjoy the feeling of the bone against their teeth and gums. I regularly watch our biggest chewer lay on the couch for what seems like hours just biting on it. The bone itself has held up extremely well and haven’t shown any signs of splintering, breaking, or falling apart. This making us feel the bone is safe considering how much they love to chew and how well it’s held up. It looks like a bone. This seems to be a factor in them wanting and/or seeking it out when they want to chew on something. Great to keep close in the living room and gets almost immediate engagement from all of them when I pull it out. Well worth it if you have problem dogs that chew everything and anything. Great as a distraction and from what we’ve seen, great for hours of engagement. Highly recommend for sure.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 12, 2026
N
NWick
Lake Worth, US
★★★★★ 5
Excellent toy for aggressive chewer dogs!!!
Color: GT-2P, Color: GT-2P
These treats are super heavy duty! My German shepherd is a good eater. This includes chewing on many things that are not make to be dog toys. I need to keep her occupied and chewing toys that are made specifically for aggressive chewers. She’s quite wily and can usually take apart those supposed aggressive chewers toys very fast. That’s why I love these toys. They actually are for aggressive chewers and keep my best friend busy chewing for days! I love that you can add soft treats or doggy toothpaste to the grooves in these. The raised bumps on the toy are also supposed to help clean teeth. A dog toy that helps with bad breath? I will take two please! Plus, love that these can be cleaned easily, even in the dish washer, and have long lasting bacon scents that my girl loves. In all seriousness, these are strange looking but very functional chew toys. They do not make a mess (other than my dog drooling all over - haha). You can even add doggy peanut butter! Perfect for big dogs and aggressive chewers. I would caution against using for any elderly dog and or dog that doesn’t have strong teeth. Good value for the price (a little over $5 each on sale) considering how long these toys last. Also a good gift.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 1, 2026
K
Verified Purchase
Karen Worley
Birmingham, US
★★★★★ 5
Dog approved!
My dogs love this. This is the 3rd time I have bought them. They are entertained for hours and keeping their teeth strong. They pay me no attention when they have this toy. 😂
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 1, 2026
C
Verified Purchase
CPickens
Boise, US
★★★★★ 5
Extra Small Perfect for my Toy Dogs
My toy dogs love this so much that I ordered a second one.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 22, 2026

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