Products Showing Parts for — {{ }}

No Results Showing Parts for — {{ }}
USD 359 359 359
Part #:

Fleece FPE-CLNTBYPS-CUMMINS-6.7 Coolant Bypass Kit

2007.5-2018 Dodge Ram 6.7L Cummins
Part #:
★★★★★ ★★★★★ 3 Reviews
FROM 359
Ships from manufacturer (Usually in 7-10 Days)

An Email Will Be Sent With Expected Shipping Date After Purchase

Our Recommendations Compatible Products
Scroll to View More


The factory cooling system in your 2007.5-2018 Dodge Ram 6.7L Cummins was designed to adequately cool a stock engine. When turning up the power, the cooling systems efficiency begins to drop resulting in a lack of coolant flow, especially to the rear cylinders. This causes excessive pressure to build in the system which can lead to blowing freeze plugs out of the block or even pushing out the smaller diameter plugs under the valve cover. 

Fleece has designed their coolant bypass kit with an important 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. Included with this kit are high quality O-ring fittings, AN hose connections with your choice of braided nylon or braided stainless steel hose to ensure a leak free installation.  

  • Includes Secondary Thermostat
  • Head Removal Not Required For Installation
  • Available with Braided Nylon or Braided Stainless Steel Hose
  • Ensures Consistent Coolant Temperature Across All Cylinders
  • 1 Year Limited Warranty
Note: 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.

Vehicle Applications

2007.5 Dodge 6.7L 24V Cummins
2008 Dodge 6.7L 24V Cummins
2009 Dodge 6.7L 24V Cummins
2010 Ram 6.7L 24V Cummins
2011 Ram 6.7L 24V Cummins
2012 Ram 6.7L 24V Cummins
2013 Ram 6.7L 24V Cummins
2014 Ram 6.7L 24V Cummins
2015 Ram 6.7L 24V Cummins
2016 Ram 6.7L 24V Cummins
2017 Ram 6.7L 24V Cummins
2018 Ram 6.7L 24V Cummins

Product Options

FPE-CLNTBYPS-6.7-SS Braided Stainless Steel
FPE-CLNTBYPS-6.7 Braided Black Nylon


  • Manufacturer Name Fleece Performance
  • Shipping Weight 15.00 lb.
  • Shipping Length 4 in.
  • Shipping Width 9 in.
  • Shipping Height 12 in.
  • Fuel Type Diesel
  • Warranty Yes
  • Warranty Info 1 Year Limited
  • Prop 65 WARNING: Cancer & Reproductive Harm -


★★★★★ ★★★★★
4.7/5 Stars out of 3 Reviews
Way cooler
(NM) | May 4th, 2021
Now getting temps around 185 instead of 205. Freeze plug was difficult to remove. More than worth it. Also changed the original thermostat to 190.
(Washington) | March 25th, 2021
Kit was easy and straightforward to install, went ahead and made sure to change the front original thermostat and match to the new fleece one at 190 degrees. Engine coolant and oil temp stays steady at 184-186 in traffic or on the freeway. Would highly recommend to anyone who tow regularly
6.7 cummins coolant bypass Makes huge difference
(Montana) | April 26th, 2020
Dropped engine temp 20 degrees when running hard or climbing up a mountain pass. I run a compound turbo on my truck 6.7 ram 4x4 2016. Only problem i had was the instructions said to use 36" pry bar to remove the rear freeze plug. After a hour trying that i went to a short punch and vice grips to hold the punch while hitting it with hammer. And I had already removed the exhaust drop pipe and inner finder. Once i removed the freeze plug everything else went smooth. I give this a 99% rating well worth the money.

Write a Review

Include Your Order Number For a Chance to Win a $100 Gift card

Overall Rating

Your Information

Email Address will not be made public.

Customer Photos

Customer Photos

See what others built Submit your photo

Questions and Answers

No questions about this product. Be the first to ask a question!

Ask a question about this product

Please allow up to 1 business day for reply.