Chevrolet Duramax Thermostat Housing Kit by Wehrli – Billet Top Outlet with Coolant Pipe, Sparkle Granny Smith (2001-2005). A precision upgrade that reroutes coolant and updates engine bay appearance.

This kit replaces the OEM upper radiator hose that crosses the driver-side valve cover along with the coolant return pipe. By directing flow upward and forward from the thermostat, it improves access to driver-side fuel system components and creates room for larger aftermarket turbochargers. Compatible with single and dual CP3 pump setups and factory VGT turbos; required when using race cover style or SXE turbos in the valley. Finished in Sparkle Granny Smith custom two-stage powder coat. Made in the USA.

Features

• CNC-machined billet aluminum thermostat upper housing
• Upper coolant pipe with silicone boots and T-bolt clamps
• Replaces GM part numbers 15792832 and 15198345
• Fits 2001-2005 Duramax LB7/LLY
• Top outlet routing for cleaner, service-friendly layout
• Compatible with single/dual CP3 and factory VGT

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

If you are considering 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