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, Candy Teal. Required for race cover style or SXE turbochargers being mounted in the valley. Wehrli 01-05 Duramax LB7/LLY Thermostat Housing Kit - Candy Teal. Thermostat Housing Kit, 2001-2005 Duramax LB7/LLY, Candy Teal. Includes coolant pipe, silicone boots, and t-bolt clamps. Replaces the following GM Part numbers:15792832,15198345. CNC Machined Billet Aluminum Thermostat Upper Housing. Compatible with factory VGT style turbochargers. Tstat Housing Kit 01-05 Dmax Cndy Teal. Engine Coolant Thermostat Housing. Custom Two Stage Powder Coating. Tstat H Kit 01-05 CT. Made in USA

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