Xtreme Diesel
Coolant Block-Off Plate XD344 Billet XDP
Put the XDP Billet Coolant Block-Off Plate XD344 in your 2011-2017 GM 6.6L Duramax to permanently eliminate coolant leaks from the rear housing on your LML and L5P engine. 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.
Features:
- Built-In O-Ring Seal
- Black Anodized Finish
- Billet Aluminum Construction
- Eliminate Rear Housing Coolant Leaks
Warranty Info:
Products manufactured by XDP carry a 1-Year warranty against defects in materials and craftsmanship. The Warranty is Limited to one (1) year from the date of sale and limited solely to the parts contained within the product's kit.

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FAQ
Your Guide to Shopping with Confidence: Essential FAQs for JRB Customs Shop Customers
What products do you offer?
We specialize in a wide range of truck parts, including performance upgrades and customization accessories.
How do I place an order?
Orders can be placed directly through our website with various payment options available.
What is your return policy?
Returns are accepted under specific conditions. Please refer to our Return and Refund Policy for more information.
How can I contact customer support?
Our customer support team is available via email.