Wehrli Custom Fabrication WCF100323-GRY 2-Piece Billet Upper Coolant Crossover Pipe - Gray

The Wehrli Custom Fabrication WCF100323 is a 2-piece billet aluminum upper coolant crossover pipe designed as a direct upgrade over the factory plastic coolant crossover on GM 6.6L Duramax diesel engines. Engineered for long-term durability and improved thermal management, this crossover pipe eliminates the common failure point of the OEM plastic unit, which is prone to cracking and leaking under the heat and pressure cycles of diesel operation.

Key Features:

• CNC-machined from high-grade billet aluminum for superior strength and heat resistance
• 2-piece design for easier installation and serviceability
• Finished in Gray powder coat for corrosion resistance and an aggressive underhood appearance
• Direct OEM replacement — no cutting, welding, or fabrication required
• Includes all necessary hardware and O-rings for a complete installation
• Designed and manufactured in the USA by Wehrli Custom Fabrication

Wehrli Custom Fabrication is a trusted name in the performance diesel community, known for precision-crafted components that combine race-proven engineering with street-ready reliability. The WCF100323-GRY is an ideal upgrade for any Duramax owner looking to eliminate a known factory weakness and add a custom look under the hood.