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For Your Every Summer RSVP, with Code: SUMMER15
Description
Fleece Performance Coolant Bypass Kit 06-07 5.9L Auto Trans CumminsHelp eliminate the chance of scored rear cylinders and blown freeze plugs on your 5. 9L Cummins with this Coolant Bypass Kit from Fleece Performance! The Fleece Coolant Bypass solves the problem of excessive coolant pressure before it becomes a problem. The integrated secondary thermostat locates at the back of the block and allows coolant to flow freely when at normal operating temperatures ensuring consistent temperatures across all six cylinders
Help eliminate the chance of scored rear cylinders and blown freeze plugs on your 5.9L Cummins with this Coolant Bypass Kit from Fleece Performance! The Fleece Coolant Bypass solves the problem of excessive coolant pressure before it becomes a problem. The integrated secondary thermostat locates at the back of the block and allows coolant to flow freely when at normal operating temperatures ensuring consistent temperatures across all six cylinders and eliminates excessive pressure. The kit comes with high quality AN o-ring fittings and AN hose connections with braided hose to ensure a leak free installation and installs in two hours or less!Increased Coolant Flow, Decreased Coolant Temperatures - The rear cylinders on the 24 Valve 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. Fleece's 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 24 valves 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.
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4.5 ★★★★★
Based on 30 reviews
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Product Reviews
★★★★★ 5
Nice quality bed
Color: Blue, Size: Large (Pack of 1)
Nice quality. My dog loves laying on this bed but hasn’t yet figured out getting inside. I cover him after he lays and he seems to enjoy it
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Reviewed in the United States on December 28, 2025
★★★★★ 4
Cozy Bed, Just Needs Fluffing
Color: Blue, Size: Large (Pack of 1)
Our dog took to this bed pretty quickly and seems to like curling up under the cave cover. It’s soft, roomy, and gives that little tucked-in feeling a lot of pets seem to love. The cover doesn’t always stay perfectly shaped, so I have to fluff it back up now and then. Other than that, it looks nice in the corner and seems comfortable enough for daily naps. Solid bed overall, especially for the price.
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Reviewed in the United States on April 9, 2026
★★★★★ 5
Great for the money
Color: Blue, Size: Large (Pack of 1)
Really beautiful, I'm not sure of what size I got but it is BIG, I have a 50lb Boston terrier and he gets lost in it, very soft with a lots of foam, he loves it
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Reviewed in the United States on January 4, 2026
★★★★★ 3
NOT WATERPROOF OR MACHINE WASHABLE
Color: Blue, Size: Large (Pack of 1)
Until today, I would have given this bed 5 stars. When I was looking for a new pet bed, I searched for “waterproof” and “machine washable”. My bad for not verifying those attributes before purchasing as I have learned Amazon search results are not reliable.
Today one of my dogs peed on the floor and dragged his bed over it. When I discovered it, I wasn’t concerned because it is waterproof and machine washable. Uh, no it is not. The cushion was wet and was too big to adequately fit in my washer and I could tell the fabric wouldn’t hold up so I hand washed in the tub. But by this evening it was still pretty wet so I tossed it in the dryer on low - by itself - to get the damp out. Well, when I took it out, the cushion had ripped open.
Meanwhile, I put the cover in the washing machine. It washed okay, but the plastic part that helps the the opening stay open came out and broke. I cannot find a hole to attempt to put it back in.
I am really irritated that it isn’t better made.
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Reviewed in the United States on June 23, 2025
★★★★★ 5
Pug Loves His Bed
Color: Blue, Size: Large (Pack of 1), Color: Blue, Size: Large (Pack of 1)
Great bed. I thought it might be too big for our pug but it is just right so he can choose whether he wants to be inside or outside of the little canopy. He didn’t go under for the first couple of months but now he loves going under the canopy especially on cold days.
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Reviewed in the United States on February 21, 2026
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