Wehrli WCFab X Fleece Thermostat Housing

1998–2018 Dodge / Ram 2500 & 3500 5.9L & 6.7L Diesel

Part #: WCF100157-FB

Overview

The Wehrli WCFab X Fleece Performance Engineering Thermostat Housing is a premium direct replacement designed specifically for Dodge and Ram trucks equipped with 5.9L and 6.7L Cummins diesel engines from 1998 through 2018. This high-quality coolant elbow upgrade replaces the factory thermostat housing, offering a cleaner, more durable alternative to the OEM part. Ideal for enthusiasts and professionals looking to enhance their engine bay’s appearance and functionality, this housing is engineered to integrate seamlessly with other WCFab cooling system upgrades.

Featuring a built-in port with a plug, the thermostat housing allows for customizable coolant routing options, giving you greater flexibility in your cooling setup. Finished in a sleek flat black powder coat, it complements other performance components such as WCFab upper coolant pipes, intake kits, and intercooler piping, ensuring a cohesive and professional look under the hood.

Key Features

Designed to meet the demands of diesel performance and reliability, the Wehrli WCFab X Fleece Thermostat Housing offers the following key features:

• Direct OEM replacement for Chrysler part number 68145495AA
• Compatible with 1998–2007 Dodge Ram 2500 & 3500 5.9L diesel engines
• Compatible with 2008–2010 Dodge Ram 2500 & 2008–2009 Dodge Ram 3500 6.7L diesel engines
• Compatible with 2011–2018 Ram 2500 & 3500 6.7L diesel engines
• Integrated coolant port with plug for customizable coolant routing
• Durable flat black powder-coated finish for corrosion resistance and aesthetic appeal
• Precision engineered to fit perfectly with WCFab cooling system upgrades
• Improves engine bay appearance by replacing the unsightly OEM thermostat housing
• Constructed to withstand high temperatures and harsh diesel engine environments

Construction & Design

The thermostat housing is crafted from high-grade materials engineered to endure the rigorous conditions of diesel engine cooling systems. Its robust construction ensures long-lasting durability and resistance to corrosion, heat, and pressure. The flat black powder coat finish not only protects the housing from environmental damage but also provides a clean, professional look that complements other WCFab components. The integrated coolant port with a removable plug adds versatility, allowing for custom coolant line configurations to optimize engine cooling performance.

Installation & Fitment

Installation of the Wehrli WCFab X Fleece Thermostat Housing is straightforward, designed as a direct bolt-on replacement for the OEM thermostat housing. No modifications are necessary, making it an ideal upgrade for both professional mechanics and experienced DIY enthusiasts. It fits a wide range of Dodge and Ram trucks equipped with 5.9L and 6.7L Cummins diesel engines from 1998 to 2018, ensuring broad compatibility across multiple model years and trims.

What's Included

• Wehrli WCFab X Fleece Thermostat Housing (Flat Black Powder Coat)
• Integrated coolant port plug
• Installation hardware (if applicable)

Ideal For

This thermostat housing is perfect for Dodge and Ram diesel truck owners seeking a reliable, high-quality replacement for their factory thermostat housing. It is especially suited for those upgrading their cooling system with WCFab components or anyone wanting to improve engine bay aesthetics while maintaining OEM-level fitment and function. Whether you’re a performance enthusiast, a professional technician, or a daily driver owner, this thermostat housing offers enhanced durability and customization options for your cooling setup.

Wehrli Custom Fabrication (WCFab) is a diesel performance and metal fabrication specialist building upgraded hard parts and engineered solutions for Duramax, Cummins, and Power Stroke trucks. Known for high-quality fabrication and truck-focused product development, WCFab supports everything from tow rigs to race-oriented diesel builds where durability, airflow, and heat management matter.