2001-2025 GM 6.6L Duramax Coolant Block-Off Plate - Billet Aluminum - Raw
The OEM block off plate uses a gasket and can leak over time. The PPE Billet Block-Off Plate is thicker and uses an O-ring seal made from Viton for maximum longevity. The PPE Billet Block-Off Plate installs using the OEM fasteners.