2017-2026 Duramax L5P Coolant Feed Block Off Plate For S300/S400 Turbos

Looking to block off the coolant port on the back of the engine block on your Duramax L5P engine? We offer this plate which utilizes an o-ring to seal so no more GM gasket is needed. 

This is strictly used for a fixed geometry turbo such as an S300 or S400 single turbo.