SKU: 501952617

2007-2012 Ram HD Coolant Bypass Kit for 2007.5-2012 RAM with 6.7L (FPE-CLNTBYPS-CUMMINS-0712)

Sale price$261.00 Regular price$290.00
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Ships within 48 hours · Estimated delivery Aug 8 - Aug 13

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Description

2007-2012 Ram HD Coolant Bypass Kit for 2007.5-2012 RAM with 6.7L (FPE-CLNTBYPS-CUMMINS-0712)The Fleece Performance Coolant Bypass Kit for 2007 2012 RAM with 6. 7L Cummins 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

The Fleece Performance Coolant Bypass Kit for 2007-2012 RAM with 6.7L Cummins 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.
  • Rear coolant bypass thermostat housing
  • Front coolant bypass thermostat housing
  • New EGR cross-over tube gaskets
  • Black braided nylon coolant bypass hose with protective high temperature sleeve and AN fittings
  • Mounting hardware
Specifications
  • Material: Braided Nylon
  • Finish: Bare
  • Engine: 6.7L Cummins
  • Country of Origin: US
  • Warranty: 1 Year Limited Warranty
Manufacturer Description

The Fleece Performance coolant bypass for the 2007-2012 RAM with 6.7L Cummins seamlessly integrates with your truck for an OE fit-and-finish.
Features:

Increased Coolant Flow, Decreased Coolant Temperatures
The rear cylinders on the 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 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.
Kit Includes:

  • Rear coolant bypass thermostat housing
  • Front coolant bypass thermostat housing
  • New EGR cross-over tube gaskets
  • Black braided nylon coolant bypass hose with protective high temperature sleeve and AN fittings
  • Mounting hardware
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: 501952617

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4.9 ★★★★★
Based on 29 reviews
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Product Reviews
K
Verified Purchase
Kandace Lopez
Whiting, US
★★★★★ 4
Fair product
Size: 30ft, Style: 6C-18AWG
nice product good price, the only issue I had was the sleeve was very loose on the wires so doesn't really hold the wires in place.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 8, 2025
D
Verified Purchase
Dale Ngo
Chelsea, US
★★★★★ 5
Fantastic to do 1 run and power multiple loads
Size: 30ft, Style: 6C-18AWG
Great for wiring up multiple loads. In my case multiple lighting with different switches so that I can turn them on independently from one another.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 1, 2026
C
Verified Purchase
CUSTOMS 572
Omaha, US
★★★★★ 5
Durable, very nice wiring harness.
Size: 50ft, Style: 6C-18AWG
I am updating an emergency vehicle and am using this to run the equipment. It’s easy to work with and good thick wire. Came with nice little Velcro straps for keeping the roll together. The finish is nice on the outer casing. Nice gloss black. Excellent product. In fact I bought another 50 foot roll. And the prices for this is extremely good. Glad I found this wiring.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 31, 2024
C
Verified Purchase
Capt Chris
New York, US
★★★★★ 5
Good quality wire
Size: 100ft, Style: 6C-18AWG
Good wire. Nice heaven outer casing. Have used several hundred feet of this for industrial vehicles. It comes in several wire counts. We use the 4 wire and 6 wire mostly and have never found an issue.
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Reviewed in the United States on October 17, 2025
I
Verified Purchase
israel
Natrona Heights, US
★★★★★ 5
Like the description
Size: 30ft, Style: 6C-18AWG
Good
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 23, 2026

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