Wehrli WCFab X Fleece Thermostat Housing

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

Part #: WCF100157-BB

Overview

The Wehrli WCFab X Fleece Performance Engineering Thermostat Housing is a premium direct replacement designed specifically for Dodge Ram trucks equipped with 5.9L and 6.7L Cummins diesel engines from 1998 through 2018. This upgraded coolant elbow kit replaces the factory thermostat housing with a more durable, visually appealing component that enhances your engine bay's appearance while providing improved functionality. Ideal for diesel enthusiasts seeking a reliable and customizable cooling solution, this housing integrates seamlessly with other WCFab cooling system upgrades.

Featuring a built-in port with a plug, the thermostat housing allows for versatile coolant routing options, enabling you to tailor your cooling setup to your specific needs. The housing comes powder coated in Bengal Blue, offering corrosion resistance and a striking finish that complements other performance parts such as WCFab Upper Coolant Pipes, Intake Kits, and Intercooler Piping.

Key Features

Engineered for durability and customization, the Wehrli WCFab thermostat housing offers several key benefits:

• Direct OEM replacement for part number 68145495AA, ensuring perfect fitment
• Compatible with 1998–2007 Dodge Ram 2500 and 3500 5.9L Diesel models
• Fits 2008–2010 Dodge Ram 2500 and 2008–2009 Dodge Ram 3500 6.7L Diesel engines
• Also fits 2011–2018 Ram 2500 and 3500 6.7L Diesel trucks
• Includes a coolant port with plug for customizable coolant routing
• Durable powder coat finish in Bengal Blue for corrosion resistance and style
• Designed to complement other WCFab cooling and intake upgrades
• Precision CNC-machined for exact OEM specifications
• Improves engine bay aesthetics by replacing the unsightly factory housing

Construction & Design

The thermostat housing is crafted from high-quality aluminum, providing excellent strength-to-weight ratio and superior heat dissipation compared to stock plastic or cast components. The CNC-machined construction ensures tight tolerances and a precise fit, reducing the risk of leaks and enhancing long-term reliability. The powder-coated Bengal Blue finish not only protects against corrosion but also adds a vibrant, custom look to your engine bay that pairs well with other performance parts.

Attention to detail in the design includes the integrated coolant port, which allows for flexible coolant line configurations, making it easier to integrate with aftermarket cooling systems or additional sensors.

Installation & Fitment

Installation of the Wehrli WCFab X Fleece Thermostat Housing is straightforward, as it is a direct bolt-on replacement for the OEM thermostat housing on compatible Dodge Ram trucks. No modifications are required, and it uses the existing mounting points and hardware. The included coolant port plug can be removed or left in place depending on your coolant routing preferences. This part is ideal for both professional installers and experienced DIY enthusiasts looking to upgrade their cooling system with minimal hassle.

What's Included

• Wehrli WCFab X Fleece Thermostat Housing (Bengal Blue powder coated)
• Coolant port plug installed
• Installation hardware (if applicable)

Ideal For

This thermostat housing is perfect for Dodge Ram owners with 5.9L or 6.7L Cummins diesel engines who want to replace the factory thermostat housing with a more durable, customizable, and visually appealing component. It is especially suited for those upgrading their cooling system with WCFab performance parts or anyone seeking improved coolant routing options and enhanced engine bay aesthetics.

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.