Wehrli 01-05 Duramax LB7/LLY Thermostat Housing Kit - Bronze Chrome

If you're working on the fuel system or upgrading the turbo on your 2001-2005 Duramax LB7 or LLY, this thermostat housing kit from Wehrli Custom Fabrication is a smart move. It re-routes the coolant flow from the thermostat housing to exit upwards and forwards, away from the driver's side valve cover. This change makes it much easier to get to your fuel system components and creates valuable extra space if you're installing a larger aftermarket turbocharger, especially the race cover or SXE style turbos.

This kit is CNC machined from billet aluminum for a solid foundation and then finished in a durable Bronze Chrome two-stage powder coat that really updates the look of your engine bay. It replaces the stock upper radiator hose and coolant return pipe, which are known by GM part numbers 15792832 and 15198345. The kit comes complete with the coolant pipe, silicone boots, and t-bolt clamps needed for installation. It's designed to work with both single and dual CP3 pump setups, and even factory VGT style turbochargers, giving you flexibility for your build.

This is a well-built upgrade that not only improves functionality but also cleans up the appearance of your engine bay. It's a popular choice for those looking to optimize their Duramax for performance work.