Wehrli 01-05 Duramax LB7/LLY Thermostat Housing Kit - Candy Teal

This Wehrli thermostat housing kit starts with a CNC machined billet aluminum upper housing, a solid choice for your 2001-2005 Duramax LB7 or LLY. It's designed to replace the stock upper radiator hose that typically crosses over the driver side valve cover, along with the coolant return pipe. This updated routing sends coolant upwards and forward from the thermostat, which is a smart move for a few reasons.

For starters, it really opens up the driver side of the engine bay. You'll find it much easier to get to your fuel system components for maintenance or upgrades. Plus, if you're planning on installing a larger aftermarket turbocharger, like a race cover or SXE style, this kit creates the necessary room. It's also compatible with factory VGT style turbochargers and can work with both single and dual CP3 pump setups. The kit comes complete with the coolant pipe, silicone boots, and t-bolt clamps, and it replaces GM part numbers 15792832 and 15198345.

Beyond the functional improvements, this kit also updates the look of your engine bay. It's finished in a durable, two-stage candy teal powder coat that's applied right here in the USA. This isn't just about performance; it's about building a truck that looks as good as it runs.