Wehrli 01-05 Chevrolet 6.6L LB7/LLY Duramax Thermostat Housing & Upper Coolant Pipe Kit - Gloss Blac

Wehrli Custom Fabrication is known for making well-built parts for Duramax diesels. This thermostat housing and upper coolant pipe kit is designed for your 2001-2005 Chevrolet Silverado 2500 HD or 3500, and GMC Sierra 2500 HD or 3500 with the LB7 or LLY Duramax engine. It replaces the stock upper radiator hose and coolant return pipe, rerouting coolant flow upwards and forward from the thermostat. This updated routing makes it easier to get to fuel system components on the driver's side and creates more room if you're installing a larger aftermarket turbocharger, especially the race cover or SXE style turbos. It also gives your engine bay a cleaner, more modern look.

This kit is CNC machined from billet aluminum for a strong and durable housing, then finished in a gloss black powder coat to resist corrosion and look sharp. It includes the coolant pipe, silicone boots, and t-bolt clamps needed for installation. This kit is compatible with both single and dual CP3 pump setups, as well as factory VGT style turbochargers. It's a direct replacement for GM part numbers 15792832 and 15198345.