Wehrli Custom Fabrication WCF100311-SBO Upper Coolant Pipe Billet Aluminum Duramax

The Wehrli Custom Fabrication WCF100311-SBO Upper Coolant Pipe is a precision-engineered billet aluminum replacement for the factory upper coolant pipe found on GM Duramax diesel engines. Designed to eliminate the common failure points associated with the OEM plastic coolant pipes, this direct-fit upgrade delivers superior durability and long-term reliability for both daily drivers and high-performance builds.

Key Features:

• CNC-machined from high-grade billet aluminum for exceptional strength and heat resistance
• Direct OEM replacement — no modification required for installation
• Finished in Satin Black Oxide (SBO) for a clean, corrosion-resistant appearance
• Engineered to withstand elevated coolant temperatures in stock and modified applications
• Eliminates the risk of cracking or warping associated with factory plastic coolant pipes
• Precision fit ensures leak-free sealing with factory O-rings or gaskets

Wehrli Custom Fabrication is known for producing industry-leading billet aluminum performance and replacement parts. The WCF100311-SBO upper coolant pipe is a popular upgrade for Duramax truck owners looking to prevent costly coolant leaks and improve the overall longevity of their cooling system.