UnderDog Diesel Billet Coolant Block-Off Plate - 2001-2024 GM 6.6L Duramax

It is known that the factory coolant plate is prone to leaks. The OEM Plate uses a metal gasket that can corrode over time, causing leaks. The UnderDog Diesel Coolant Block-Off Plate for the GM 6.6L Duramax is the fix for this issue!

Machined Billet Aluminum with an integrated O-Ring Seal, you can be sure to permanently eliminate those leaks from causing you issues down the road. 

Features: 

Integrated O-Ring Seal

Black Anodized Finish

Billet Aluminum 

Included Grade 10.9 Hardware

Note: You will lose about 4 Gallons of Coolant during installation. Downpipe needs moved out of the way to access the plate.