Wehrli Upper Coolant Pipe

2013–2018 Ram 2500 / 3500 6.7L Diesel

Part #: WCF100517-GRY

Overview

The Wehrli Upper Coolant Pipe is a premium aluminum replacement for the OEM rubber upper coolant hose on 2013 to 2018 Ram 2500 and 3500 heavy-duty trucks equipped with the 6.7L Cummins diesel engine. Designed to connect the radiator inlet efficiently, this pipe offers a durable and reliable upgrade over the factory rubber hose. It is an ideal solution for owners seeking improved longevity and a clean, custom look under the hood, especially when paired with OEM RAM radiators.

Built to withstand the demanding conditions of heavy-duty diesel applications, this upper coolant pipe helps maintain optimal engine temperatures by ensuring consistent coolant flow. Its powder-coated finish in WCFab Grey not only enhances corrosion resistance but also adds a sleek aesthetic touch to your engine bay.

Key Features

Engineered for durability and performance, the Wehrli Upper Coolant Pipe offers the following key benefits:

• Constructed from high-quality aluminum for superior strength and heat resistance
• Direct replacement for OEM rubber upper coolant hose, ensuring precise fitment
• Powder-coated in WCFab Grey for enhanced corrosion protection and visual appeal
• Compatible with OEM RAM radiators to maintain factory inlet dimensions and fit
• Eliminates the common wear and cracking issues associated with rubber hoses
• Improves coolant flow reliability under high-temperature conditions
• Replaces multiple MOPAR part numbers for broad compatibility
• Designed specifically for 2013–2018 Ram 2500 and 3500 6.7L Cummins diesel trucks

Construction & Design

This upper coolant pipe is precision-crafted from lightweight yet robust aluminum, chosen for its excellent thermal conductivity and resistance to corrosion. The aluminum construction ensures the pipe maintains its shape and integrity under extreme heat and pressure, unlike traditional rubber hoses that can degrade over time. The powder-coated finish in WCFab Grey provides an additional protective layer against rust and environmental damage, extending the service life of the component.

The design closely replicates the OEM hose dimensions and connection points, allowing for a seamless swap without the need for modifications. This attention to detail ensures a secure, leak-free fit that supports the cooling system’s efficiency and reliability.

Installation & Fitment

Installation of the Wehrli Upper Coolant Pipe is straightforward and designed to be a direct bolt-on replacement for the factory rubber hose. It fits 2013 through 2018 Ram 2500 and 3500 trucks equipped with the 6.7L Cummins diesel engine and OEM RAM radiators. No special tools or modifications are required, making it an accessible upgrade for professional mechanics and experienced DIY enthusiasts alike.

Note that fitment is optimized for use with OEM radiators; aftermarket radiators with differing inlet locations may cause fitment issues. Always verify radiator compatibility before installation to ensure proper alignment and sealing.

What's Included

• One Wehrli Upper Coolant Pipe, powder-coated in WCFab Grey
• All necessary clamps and hardware for installation (if applicable)
• Installation instructions

Ideal For

This upper coolant pipe is perfect for Ram 2500 and 3500 owners who want to upgrade from the OEM rubber hose to a more durable, long-lasting aluminum component. It is especially suited for those who demand reliability under heavy-duty use, such as towing, hauling, or off-road driving, and for enthusiasts who appreciate a clean, custom engine bay appearance. It also benefits anyone looking to prevent common coolant hose failures and maintain optimal engine cooling performance.

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.