Sale

Heating and Cooling Thermostats, Housings and Fillers

Fleece Performance

Fleece Performance 98.5-02 Dodge 5.9L Cummins VP Coolant Bypass Kit

$397.95 $379.00 Save $18.95

SKU: F007 FPE-CLNTBYPS-CUMMINS-VP

In Stock
In Stock
Ships by Jul 30
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The Fleece Performance FPE-CLNTBYPS-CUMMINS-VP is a coolant bypass kit designed for 1998.5-2002 Dodge Cummins VP44 engines. This kit addresses a critical issue where the rear cylinders of the 5.9L and 6.7L Cummins engines experience a lack of coolant flow and higher temperatures.

The coolant bypass kit adds a secondary thermostat that operates based on temperature, ensuring consistent temperatures across all six cylinders and preventing excessive pressure buildup in the cooling system. This helps to prevent failures such as freeze plugs blowing out. The kit includes braided hose and AN O-ring fittings for a leak-free installation.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandFleece Performance
Part NumberF007 FPE-CLNTBYPS-CUMMINS-VP

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.

View Full Return Policy