Make sure your side freeze plugs stay firmly mounted in your 1989-2018 Dodge 5.9L and 6.7L Cummins with the XDP HD Bolt-On Freeze Plug (Side) XD334. The bolt-on freeze plugs eliminate the risk of a blown freeze plug due to increased coolant pressure from high engine RPM, differences in cooling temperatures, faulty freeze plugs, and more. Each Bolt-On Freeze Plug is CNC machined from 6061 aluminum and features an o-ring gasket for a leak-free seal. Features: Bolt-On DesignO-Ring Gasket SealEliminates Risk Of Blown Freeze PlugsCNC-Machined 6061 Aluminum ConstructionApplication Notes: Due to many different engine block castings throughout the years, you will need to check how many freeze plugs you will need.1994-1998 4BT - 1 or 2 (depending on block).1989-1998 6BT - 3 or 4 (depending on block).1998.5-2002 24V - 32003-Present Common Rail - 3