Chevrolet Duramax Thermostat Housing Kit - Wehrli - Top Outlet Billet, Chevy Orange, 06–10. This WCFab kit replaces the stock upper outlet with a top-exit billet housing and upper pipe for a tidy, service-friendly LBZ/LMM engine bay.

Designed for 2006–2010 Duramax LBZ/LMM, it reroutes coolant upward and forward from the thermostat, replacing the OEM upper radiator hose that crosses the driver-side valve cover and the coolant return pipe. This improves access to driver-side fuel components and adds room for larger aftermarket turbochargers. Available for single CP3 (WCF100420) or twin CP3/dual-alternator setups (WCF100424), finished in Chevy Orange powder coat. The kit includes the coolant pipe, silicone boots, and T-bolt clamps; the CNC-machined billet aluminum upper housing is compatible with factory VGT turbos and is required for race cover or SXE turbos in the valley.

Features

• Fits 2006–2010 GM Duramax LBZ/LMM
• Replaces OEM upper hose and coolant return pipe
• CNC-machined billet aluminum thermostat upper housing
• Upward/forward routing improves access and turbo clearance
• Includes coolant pipe, silicone boots, and T-bolt clamps
• WCF100420 (single CP3), WCF100424 (twin/dual alternator)
• Replaces GM PNs: 19330105, 15792824, 25833204, 97361881
• Not compatible with 2006–2007 GMC Sierra

Questions or planning an install? Call our Austin, TX shop at 512-982-9393 or our Los Angeles, CA area shop at 562-981-6800. We offer installation and customization services at both locations.

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

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