GMC Sierra 2500HD Thermostat Housing Kit - Wehrli - CNC Machined Billet Aluminum - Cat Yellow - 2001-2005. This top-outlet kit re-routes coolant upward and forward from the thermostat for a cleaner, service-friendly layout on LB7/LLY Duramax trucks.

Replacing the factory upper radiator hose over the driver-side valve cover and the coolant return pipe, it opens access to driver-side fuel components and makes space for larger aftermarket turbos. Works with Single and Dual CP3 setups, is compatible with factory VGT turbos, and is required for race-cover or SXE units in the valley. CNC machined in the USA with a Cat Yellow single-stage powder coat.

Features

• Billet aluminum thermostat upper housing
• Upward/forward coolant routing
• Includes coolant pipe, silicone boots, T-bolt clamps
• Replaces GM 15792832 and 15198345
• Fits 2001-2005 GMC Sierra 2500HD Duramax LB7/LLY

Have 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 at both locations. Buying multiple items? Contact us for shipping discounts. We install on premises in Austin and Los Angeles.

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