Wehrli Upper Coolant Pipe

2019–2024 Ram 2500/3500 6.7L Diesel

Part #: WCF100223-KIWI

Overview

The Wehrli Upper Coolant Pipe is a premium aluminum replacement for the OEM rubber upper coolant hose on 2019–2024 Ram 2500 and 3500 trucks equipped with the 6.7L Cummins diesel engine. Designed specifically for use with the OEM RAM radiator, this upper coolant pipe offers enhanced durability and reliability over the factory rubber component. It is an ideal upgrade for owners seeking a long-lasting cooling system solution that withstands high temperatures and harsh operating conditions.

Finished in an eye-catching Kiwi Green powder coat, this coolant pipe not only improves the engine bay’s appearance but also provides corrosion resistance to ensure lasting performance. Please note this part is compatible only with the standard output Cummins engine option. For trucks equipped with the optional high output engine and cooling system, Wehrli offers a separate compatible part.

Key Features

Engineered to deliver superior performance and reliability, the Wehrli Upper Coolant Pipe includes the following key features:

• Direct replacement for OEM rubber upper coolant hose, ensuring a perfect fit
• Constructed from lightweight, durable aluminum for enhanced heat resistance
• Powder coated in Kiwi Green for corrosion protection and distinctive styling
• Compatible with OEM RAM radiator for guaranteed fitment and function
• Replaces MOPAR part numbers 68359598AF, 68359598AD, and 68359598AE
• Designed exclusively for standard output 6.7L Cummins diesel engines (2019–2024 Ram 2500/3500)
• Improves cooling system reliability by eliminating rubber hose degradation issues
• Precision engineered to maintain proper coolant flow and system pressure

Construction & Design

The Wehrli Upper Coolant Pipe is crafted from high-quality aluminum, chosen for its excellent thermal conductivity and resistance to heat-related wear. Unlike OEM rubber hoses that can soften, crack, or swell over time, this aluminum pipe maintains structural integrity under extreme engine temperatures and pressure fluctuations. The powder coat finish not only enhances corrosion resistance but also adds a vibrant Kiwi Green color that stands out in the engine bay.

Every detail of the pipe’s design is optimized for a direct bolt-on installation with the OEM radiator and cooling system components, ensuring no modifications are required for proper fitment. The robust construction guarantees long-term durability, making it a reliable upgrade for daily drivers and heavy-duty users alike.

Installation & Fitment

Installation of the Wehrli Upper Coolant Pipe is straightforward and designed to be a direct replacement for the factory rubber hose. It fits 2019–2024 Ram 2500 and 3500 trucks equipped with the 6.7L standard output Cummins diesel engine and OEM radiator. No special tools or modifications are necessary, making it suitable for professional installers and experienced DIY enthusiasts.

Note that this part is not compatible with aftermarket radiators, which may cause fitment issues. Additionally, trucks equipped with the high output Cummins engine and cooling system require a different upper coolant pipe model, so please verify your engine configuration before purchase.

What's Included

• One Wehrli Upper Coolant Pipe, powder coated in Kiwi Green
• All necessary mounting hardware for installation
• Installation instructions

Ideal For

This upper coolant pipe is ideal for Ram 2500 and 3500 owners who want to upgrade their cooling system with a durable, long-lasting component that outperforms the OEM rubber hose. It is especially suited for those who operate their trucks in demanding conditions or seek a visually distinctive engine bay upgrade. Whether for daily driving, towing, or heavy-duty work, this part enhances cooling system reliability and peace of mind.

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.