Wehrli · New
Wehrli 01-05 GM Duramax LB7/LLY Thermostat Housing Kit - Semi-Gloss Black
MPN WCF100405-SGB · Store SKU wcfWCF100405-SGB
Supplier stock checked 11/7/2026, 4:35:58 PM UTC. Adding a part does not reserve it.
Request a return within 30 calendar days after delivery. New parts must be unopened and unused.
Shipping & returns ↗This policy does not limit rights required by law.Free standard shipping on eligible parts orders of $100 or more. Oversized and freight items excluded. Fitment, taxes, availability and final totals are confirmed before payment.
Product details
The Top Outlet Billet Thermostat Housing and Upper Coolant Pipe Kit for 2001-2005 LB7/LLY Duramax replaces the OEM upper radiator hose that normally crosses over the driver side valve cover as well as the coolant return pipe. By changing the coolant routing to an upwards and forward layout from the thermostat, this kit improves access to driver side fuel system components, adds room for larger aftermarket turbochargers, and updates engine bay appearance. Compatible with Single and Dual CP3 Pump setups. Finished in your choice of custom powder coat colors. Wehrli Custom Fab Thermostat Housing Kit, 2001-2005 Duramax LB7/LLY, Semi-Gloss Black Thermostat Housing Kit, 2001-2005 Duramax LB7/LLY, Semi-Gloss Black
Manufacturer fitment & guides
Check WCF100405-SGB against the manufacturer’s application information below.
A manufacturer application guide is not available for this listing. Request the exact application from JuiceBuilt before payment.
Part-specific notes
- California Proposition 65: Y
