D&J Precision Machine

Cummins Billet Rear Freeze Plug The Cummins Common Rail '03-to-Current Billet Rear Freeze Plug addresses the common issues associated with high coolant pressure. This plug is designed to bolt securely to the back of the block, ensuring a reliable seal and improved performance. Included:...

You're interested in our D&J Precision Machine American Flag Shirt? You want to represent our brand in the snazziest, coolest and most patriotic way possible? Thank you!! We must admit, it?s pretty fun to do that. We do it every day! Not only are...

ISB Stage 1 24v Cummins Performance Head Elevate your engine's performance with our ISB Stage 1 24v Cummins Performance Head. Designed to enhance power without the added cost and complexity of an aftermarket intake, this performance head combines the best of our industry-leading remanufactured...

6.7 CR HP Reman Cummins Cylinder Head   Our 6.7 CR HP Reman Cylinder Head includes essential upgrades to ensure durability and reliability, addressing common issues associated with these heads. One prevalent problem with factory and many aftermarket heads is the valve seats loosening...

Stage 2 6.7 CR Cummins Performance Head Our Stage 2 6.7 CR Cummins Performance Head is designed for the performance enthusiast. It includes everything in our Stage 1 Cummins Performance Head plus a D&J Stage 2 6.7 CR Billet Intake Manifold, thread-in soft plugs...