SKU: 11679169154

1994-1998 Ram HD 12V Coolant Bypass Kit (FPE-CLNTBYPS-CUMMINS-12V)

Sale price$247.29 Regular price$274.77
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Description

1994-1998 Ram HD 12V Coolant Bypass Kit (FPE-CLNTBYPS-CUMMINS-12V)The Fleece Performance 12V Coolant Bypass Kit 1994 1998 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

The Fleece Performance 12V Coolant Bypass Kit 1994-1998 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.
Specifications
  • Fuel Type: Diesel
  • Engine: Cummins
  • 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.

Kits for MY 2003+ 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: 11679169154

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Amazon Customer
Grantham, US
★★★★★ 4
Fit great
Size: CF11966&CA12260
Fit was great. Cabin filter was better quality than the original from GM.
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Reviewed in the United States on February 18, 2026
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Rebekah
Port Orchard, US
★★★★★ 5
Good deal
Size: CF10930&16546AA090
Seems a bit thinner than my last two, but they did come together for the price of one. Seems to be of good quality non the less. Fits well in my 2014 Subaru forester
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Reviewed in the United States on April 22, 2026
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stiff Ola
Los Angeles, US
★★★★★ 5
Good deal
Size: CA12377&CF12157
Easy to install and much cheaper than the dealership cost. Quality was good, also had installation instructions.
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Reviewed in the United States on May 26, 2026
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Alex
Lake Worth, US
★★★★★ 5
Perfect Fit for 2021 Honda Odyssey Elite
Color: CA12061
This engine air filter was a perfect fit for our 2021 Honda Odyssey Elite. Installation was quick and easy, popped right into place with no issues at all. The build quality looks great, and it feels just as solid as the factory filter it replaced. It’s always nice to find a reliable replacement part that fits exactly as it should. We drive a lot of gravel as well and this has held up well to those elements. Great value compared to dealership pricing. Will definitely purchase again when it’s time for the next replacement.
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Reviewed in the United States on February 19, 2026
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StandUpToTyranny
Port Orchard, US
★★★★★ 5
Great quality and cost effective!
Color: CA12061
My mechanic says this is a great filter. They installed free (30 seconds) whereas Honda wanted $150 plus labor is it to install theirs. 🙄
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Reviewed in the United States on January 29, 2026

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