GMC Duramax LBZ Thermostat Housing Kit - Wehrli - Cat Yellow - 08-10. A CNC-machined top-outlet housing and upper coolant pipe kit that cleans up routing and supports serious under-hood upgrades.

Built by Wehrli Custom Fab, this kit replaces the OEM upper radiator hose that crosses the driver-side valve cover and the coolant return pipe. Rerouting coolant upward and forward from the thermostat improves access to driver-side fuel components and creates room for larger turbochargers. Finished in Cat Yellow powder coat, it includes the coolant pipe, silicone boots, and T-bolt clamps. Compatible with factory VGT turbos and required when using race-cover or SXE turbos in the valley. Options are available for single or twin CP3 setups.

Features

• CNC-machined billet aluminum thermostat upper housing
• Upward/forward coolant routing for clearance and service access
• Includes pipe, silicone boots, and T-bolt clamps
• Single (WCF100420) or twin CP3 (WCF100424); dual alternator/dual CP3 use WCF100424
• Replaces GM PNs: 19330105, 15792824, 25833204, 97361881
• Not compatible with 2006–2007 GMC Sierra

Have questions or want to plan your build? Call our Austin shop at 512-982-9393 or our Los Angeles area shop at 562-981-6800. We offer installation and customization services at both locations.

If you are considering multiple items, contact us for potential shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov