2001-2004 GM 6.6L Duramax Thermostat Housing Cover POLISHED - 119000533 Truck Brand:CHEVROLET/GMC 2500 The 12th digit of the

The 12th digit of the VIN will verify this

The patented heat shield/air box includes a battery relocating tray to allow for the extra large Pro 5R filter

7L Intake Open Grid for additional flow and performance

The damage and distortion that typically happens with a plastic screw from under hood temperatures and routine servicing will no longer be a problem because PPE’s Air Bleeder Screw features billet aluminum construction and a Nitrile O-ring seal

The additional return line port allows you to remove the factory fuel pressure relief valve hard line and fuel injector return galley hard line to provide clearance for high flow side draft intakes

2001-2004 GM 6.6L Duramax Thermostat Housing Cover POLISHED - 119000533 Truck Brand:CHEVROLET/GMC 2500 The 12th digit of theRust is the enemy of your coolant system. Upgrade your rusty OEM thermostat housing cover with a Cast 304 Stainless Steel Thermostat Housing Cover from PPE. This direct bolt on replacement adds style and function to your engine bay. The stainless steel material is corrosion and rust resistant. We've engineered an easy way of bleeding off air from your coolant system by adding our Black Anodized Aluminum Bleeder Screw with a built in air channel and a