Our D&J Precision Machine Cummins Billet Freeze Plug design does not require drilling or tapping of the block. To hold our freeze plug in the block, it uses an o-ring sealed center bolt and a steel tie-bar. We offer a diverse selection of our freeze plugs with a natural finish or anodized black. Whether you are on the search for a single freeze plug or a kit that includes 3 side plugs and one front for your engine, viewing our wide selection is sure to help you make the best choice. Find the product that’s best for you!