Shop Blessed Performance for the XDP Billet Coolant Block-Off Plate for your 2001-2022 GM 6.6L LB7/LLY/LBZ/LMM/LML/L5P Duramax diesel. The factory cover uses a gasket and over time the plate can warp, and the gaskets can corrode causing coolant leaks. The XD344 is made from CNC-machined billet aluminum and features a built-in O-ring seal for a leak-free installation. Each coolant block-off plate comes with a black anodized finish and is ready to install re-using your factory hardware.
Highlights:
- Built-In O-Ring Seal
- Black Anodized Finish
- Billet Aluminum Construction
- Eliminate Rear Housing Coolant Leaks