Wehrli WCFab X Fleece Thermostat Housing

2019–2024 Ram 2500 / 3500 6.7L Diesel

Part #: WCF100169-BB

Overview

The Wehrli WCFab X Fleece Thermostat Housing is a premium direct replacement upgrade designed specifically for the 2019–2024 Ram 2500 and 3500 trucks equipped with the 6.7L Cummins diesel engine. This high-quality coolant elbow kit replaces the factory thermostat housing, offering a cleaner, more durable, and visually appealing alternative to the OEM part. Ideal for enthusiasts and professionals looking to enhance their engine bay aesthetics while maintaining reliable cooling system performance.

Featuring a functional port with a plug, this thermostat housing allows for customizable coolant routing options, making it a versatile choice for those running upgraded cooling components or custom setups. The housing is finished with a durable powder coat available in Bengal Blue, providing corrosion resistance and a striking appearance that complements other WCFab and Fleece Performance Engineering upgrades.

Key Features

This thermostat housing combines thoughtful engineering with practical features to improve both form and function:

• Direct OEM replacement for a perfect fit on 2019–2024 Ram 2500 and 3500 6.7L Cummins engines
• Integrated coolant port with plug for flexible coolant routing and sensor installation
• Durable powder-coated finish in Bengal Blue for corrosion resistance and enhanced engine bay aesthetics
• Compatible with WCFab Upper Coolant Pipes, Intake Kits, and Intercooler Piping for seamless system integration
• Manufactured to precise specifications ensuring reliable sealing and long-term durability
• Improves engine bay appearance by replacing the unsightly OEM thermostat housing
• Designed to withstand the demanding conditions of diesel engine cooling systems

Construction & Design

The Wehrli WCFab X Fleece Thermostat Housing is crafted from high-grade materials engineered for strength and longevity. The housing is precision-machined to ensure a perfect fit and reliable sealing against coolant leaks. Its robust construction is complemented by a powder-coated finish that protects against corrosion and wear, even under harsh engine bay conditions. The Bengal Blue color option not only adds a custom look but also coordinates well with other performance parts, creating a cohesive and professional appearance.

Installation & Fitment

Installation is straightforward as this thermostat housing is designed as a direct bolt-on replacement for the factory unit on 2019–2024 Ram 2500 and 3500 trucks with the 6.7L Cummins diesel engine. No modifications are required, making it an ideal upgrade for both DIY enthusiasts and professional installers. The included coolant port plug allows for easy customization of coolant lines or sensor placement without additional fabrication.

What's Included

• Wehrli WCFab X Fleece Thermostat Housing in Bengal Blue powder coat
• Coolant port plug for customization
• Installation hardware as required for direct replacement

Ideal For

This thermostat housing is perfect for Ram 2500 and 3500 owners who want to upgrade their cooling system components with high-quality, durable parts that improve both function and appearance. It is especially suited for those running upgraded coolant pipes, intake systems, or intercooler setups who require flexible coolant routing options. Whether you are a diesel performance enthusiast, a professional builder, or simply looking to replace a worn OEM part with a superior alternative, this thermostat housing offers a reliable and stylish solution.

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.