GMC Sierra Thermostat Housing Kit - Wehrli - Billet Upper Housing - Fine Texture Black - 08–10. A top-outlet thermostat housing and upper coolant pipe kit that replaces the factory upper hose and return pipe on 2008–2010 Sierra 6.6L Duramax models.

By rerouting flow upward and forward from the thermostat, this kit improves access near driver-side fuel components and adds clearance for larger turbochargers. The CNC-machined billet aluminum upper housing features a Fine Texture Black finish, and the kit includes the coolant pipe, silicone boots, and T-bolt clamps. Compatible with factory VGT turbos. For dual CP3 or dual-alternator trucks, use WCF100424. Replaces GM 19330105, 15792824, 25833204, 97361881.

Features

• CNC-machined billet aluminum upper thermostat housing
• Fine Texture Black powder coat
• Upward/forward top-outlet routing for added clearance
• Includes coolant pipe, silicone boots, and T-bolt clamps
• Fits 2008–2010 GMC Sierra 6.6L Duramax; not for 2006–2007

Questions or need help planning your build? Call our Austin shop at 512-982-9393 (TX) or our Los Angeles area shop at 562-981-6800 (CA). We install on premises at both locations and offer customization services. If you’re considering multiple items, contact us for shipping discounts.

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