WEHRLI CUSTOM FAB WCF100622 2006-2010 LBZ LMM DURAMAX UPPER COOLANT PIPE

Product Description

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The WEHRLI CUSTOM FAB WCF100622 2006-2010 LBZ/LMM DURAMAX UPPER COOLANT PIPE is a high-quality cooling system upgrade designed to replace the restrictive and aging factory rubber coolant hose found on LBZ and LMM Duramax trucks. Wehrli Custom Fabrication engineered this upgrade using durable aluminum construction to improve long-term reliability while giving the engine bay a clean, performance-oriented appearance.

Over time, factory coolant hoses can become soft, brittle, or prone to leaks due to constant heat cycles. The WCF100622 solves this problem by replacing the upper coolant connection with a rigid aluminum pipe designed to handle the heat and pressure of heavy-duty diesel operation. This upgrade is ideal for daily drivers, tow rigs, and performance builds that demand better durability from critical cooling components.

Key Benefits:

• Replaces failure-prone factory rubber coolant hose
• Durable aluminum coolant pipe construction
• Improves long-term reliability of the cooling system
• Cleaner engine bay appearance
• Designed specifically for LBZ and LMM Duramax engines
• Direct bolt-on installation
• Made in the USA

This coolant pipe upgrade is a popular modification for owners looking to improve durability in high-mileage trucks or trucks that tow regularly. The improved material strength and cleaner routing make it both a performance and appearance upgrade.

Fitment:

• 2006 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax LBZ
• 2007 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax LBZ
• 2007.5 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax LMM
• 2008 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax LMM
• 2009 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax LMM
• 2010 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax LMM
• 2006 GMC Sierra 2500HD / 3500HD 6.6L Duramax LBZ
• 2007 GMC Sierra 2500HD / 3500HD 6.6L Duramax LBZ
• 2007.5 GMC Sierra 2500HD / 3500HD 6.6L Duramax LMM
• 2008 GMC Sierra 2500HD / 3500HD 6.6L Duramax LMM
• 2009 GMC Sierra 2500HD / 3500HD 6.6L Duramax LMM
• 2010 GMC Sierra 2500HD / 3500HD 6.6L Duramax LMM

What’s Included:

• Wehrli Custom Fab aluminum upper coolant pipe
• Silicone couplers
• Stainless steel clamps
• Installation hardware

FAQ

Why upgrade the factory coolant pipe?

The factory hose is rubber and can degrade over time due to heat cycles. The Wehrli aluminum coolant pipe provides improved durability and reduces the chance of hose failure.

Does this fit both LBZ and LMM Duramax engines?

Yes. The WCF100622 is designed to fit both the 2006–2007 LBZ Duramax and the 2007.5–2010 LMM Duramax trucks.

Is installation difficult?

No. The coolant pipe is designed as a direct bolt-on replacement and can typically be installed with basic hand tools.

Will this improve engine cooling?

This upgrade focuses primarily on durability and reliability rather than increasing cooling capacity. However, it eliminates a common failure point in the factory cooling system.