Chevrolet Duramax LBZ Thermostat Housing Kit - Wehrli - Cat Yellow - '06-'10. This billet top-outlet thermostat housing and upper coolant pipe kit re-routes factory plumbing on 2006–2010 Duramax LBZ/LMM trucks.

By replacing the OE upper radiator hose over the driver-side valve cover and the coolant return pipe, this kit routes coolant upward and forward for cleaner plumbing, easier service access, and added room for larger turbochargers. The CNC-machined billet aluminum upper housing in Cat Yellow works with factory VGT turbos and is required when using race-cover or SXE chargers in the valley. Choose single (WCF100420) or twin CP3 (WCF100424); use WCF100424 with dual CP3 or dual-alternator setups. Not compatible with 2006–2007 GMC Sierra.

Features

• Replaces OE upper radiator hose and coolant return pipe
• Up-and-forward routing for better service access and turbo clearance
• CNC-machined billet upper housing; includes pipe, silicone boots, T-bolt clamps; compatible with factory VGT

Questions or need fitment help? Call our Austin, Texas shop at 512-982-9393 or our Los Angeles, California area shop at 562-981-6800. We offer installation and customization services at both locations.

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

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