01-26 6.6L Duramax Billet Coolant Block Off Plate

Upgrade your rear engine cover and stop coolant leaks for good.

This billet coolant block off plate is thicker and stronger than the factory cover and features an integrated square cut O ring, so no gasket is required. Stock rear covers are known to seep and leak over time. This upgraded billet plate provides a better seal and long term reliability to help eliminate rear engine coolant leaks for good.