GMC Duramax Thermostat Housing Kit - Wehrli - Billet - Sparkle Copper - 2006-2010. This top-outlet billet thermostat housing and upper coolant pipe kit reroutes the upper hose for a cleaner, service-friendly layout on LBZ/LMM trucks.

Replacing the factory upper radiator hose and coolant return pipe, the kit directs coolant upward and forward from the thermostat to improve access to driver-side fuel system components and free space for larger aftermarket turbochargers. It includes a CNC-machined billet aluminum thermostat upper housing, coolant pipe, silicone boots, and T-bolt clamps, finished in Sparkle Copper powder coat. Compatible with factory VGT turbos and required when running race cover or SXE turbos in the valley. Options are available for single CP3 (WCF100420) or twin CP3 (WCF100424); use WCF100424 on WCFab dual CP3 or dual alternator trucks. Replaces GM 19330105, 15792824, 25833204, 97361881.

Features

• Fits 2006-2010 Duramax LBZ/LMM
• Upward/forward coolant routing for improved access and turbo clearance
• CNC-machined billet aluminum thermostat upper housing
• Includes coolant pipe, silicone boots, and T-bolt clamps
• Compatible with factory VGT; required for race cover or SXE turbos in the valley
• Not compatible with 2006-2007 GMC Sierra

Have questions or need guidance on your build? Call us at 512-982-9393 (Austin, TX) or 562-981-6800 (Los Angeles, CA area). We offer installation and customization services at both locations.

Thinking about purchasing multiple items? Contact us for shipping discounts. We install on premises at both locations.

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