Wehrli Custom Fabrication WCF100696-DG LML Duramax Upper Coolant Pipe Dark Gray

The Wehrli Custom Fabrication WCF100696-DG is a fabricated aluminum upper coolant pipe designed as a direct-fit replacement for the factory rubber upper radiator hose on 6.6L LML Duramax diesel engines. Finished in a Dark Gray powder coat, this pipe combines functional durability with a clean, custom engine bay appearance.

The OEM rubber upper coolant hose is a known weak point in the LML cooling system — prone to cracking, collapsing, and heat degradation over time. The WCF100696-DG replaces it with a precision-fabricated aluminum hard pipe that resists heat, vibration, and age far better than the factory component.

Key Features:

• Fabricated aluminum construction — far more durable than the OEM rubber hose
• Dark Gray powder coat finish — corrosion-resistant and color-matched for a custom underhood look
• Direct-fit replacement — bolt-on installation with no cutting or modification required
• Includes silicone boots and T-bolt clamps for a leak-free, secure connection
• Made in the USA by Wehrli Custom Fabrication

The kit includes the coolant pipe, silicone boots, and T-bolt clamps — everything needed for a complete installation. WCFab's powder coat finish is applied in-house and is available in a wide variety of colors, making it easy to coordinate with other engine bay components.