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Wehrli’s top outlet billet thermostat housing and upper coolant pipe kit for 2001–2005 LB7/LLY Duramax reroutes the upper radiator connection upward and forward from the thermostat to improve access to driver‑side fuel components and create space for larger aftermarket turbochargers. Compatible with single and dual CP3 pump setups, the kit includes coolant pipe, silicone boots and t‑bolt clamps and is finished in custom powder coat colors. CNC machined billet aluminum construction and compatible with factory VGT style turbos.
Wehrli 01-05 Duramax LB7/LLY Thermostat Housing Kit - WCFab Red
