Heating and Cooling Thermostats, Housings and Fillers

Fleece Performance

RAM 3500 6.7L CUMMINS COOLANT BYPASS KIT

$379.99

SKU: F007 -CLNTBYPS-CUMMINS-1318

In Stock
In Stock
Ships by Jun 9
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The Fleece Performance Coolant Bypass for 2013-2018 Ram with 6.7L Cummins is designed to increase coolant flow and decrease coolant temperatures, particularly in the rear cylinders of the 6.7L Cummins engine. This helps prevent excessive pressure buildup in the cooling system, which can lead to freeze plug failures. The kit includes a secondary thermostat that operates based on temperature, ensuring consistent temperatures across all six cylinders.

Fitment

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Specifications

BrandFleece Performance
Part NumberF007 -CLNTBYPS-CUMMINS-1318

Videos

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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