2001-2005 Duramax Billet Forward Facing Thermostat Housing Kit (040-HSP)

This Thermostat housing is to be used when running an aftermarket turbocharger with no cooling provisions. Many of the Duramax coolant lines are routed in a way that makes it difficult to upgrade turbochargers or other performance accessories. Now there is a solution for many of those issues. The all-new billet thermostat housing and tube kit eliminates the factory coolant hose that crosses over the driver-side valve cover. This makes for more room for aftermarket turbo systems and fuel components. 

Part Number: 040-HSP

• CNC Machined Billet Aluminum thermostat upper housing
• Allows for added room for aftermarket turbochargers
• Easier access to fuel system components on drivers side valve cover
• Powder-coated hard tube for an appealing engine bay
• Reinforced silicone boots and hard tube add strength over the factory rubber hose
• Allows room for dual CP3 pump kits

Includes:

• 1x Thermostat Housing O-Ring
• 3x M6 x 1.0 x 35mm Flange Bolts
• 6x M6 Fender Washer
• 3x M6 Nylon Lock Nuts
• 4x M8 x 1.25-25mm Socket Cap bolt
• 4x M6 x 1.0-18mm Socket Cap bolt
• 1x 1.75" x 3" Straight Boot (437-RFAB)
• 1x 1.75" x 90° Boot (433-RFAB)
• 4x 1 3/4" Worm Gear Clamps (408-RFAB)

• LB7: 01-04 VIN Code 1
• LLY: 04.5-05 VIN Code 2
• Engine code is dictated by the 8th character of the VIN number. The 10th character is the year of the truck.

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