HSP LBZ/LMM Billet Thermostat Housing Kit With Coolant Return

Built to order notice
Most of these kits are built to order depending on color choice. Please expect a 1-2 month lead time. Call ahead before ordering to see if any colors are available for immediate shipment.

Eliminate the restrictive factory coolant hose routing on your 2006-2010 GM 6.6L Duramax with the HSP LBZ/LMM Billet Thermostat Housing Kit with Coolant Return.

This kit replaces the factory upper thermostat housing with a CNC machined billet aluminum housing and redesigned hardline routing. It removes the coolant hose that crosses over the driver side valve cover, creating valuable room in the engine valley for larger drop in turbochargers and dual CP3 setups. HSP includes reinforced silicone boots and a hard tube for improved durability compared to the factory rubber hose.

It also helps create a much cleaner engine bay, especially when switching to a different turbo setup. Provisions for turbocharger coolant return are included.

Features
Reinforced silicone boots
Includes all required installation hardware
Creates room for dual CP3 kits and larger drop in turbos
CNC billet aluminum upper thermostat housing
Improved design for easier access to the driver side valve cover
Turbocharger coolant return provision included