Black Friday 2025

D&J Precision Machine 9/16x6.5" Head Stud Kit   Our 9/16x6.5" head stud kit is designed and manufactured for ultimate performance and reliability. Custom made by ARP, these head studs are complemented by nuts and washers machined by us to ensure proper clearance for the...

D&J 24v VP44 HP Reman Block At D&J Precision Machine, we understand the value of providing our customers with the option to rebuild their own engines. With that in mind, we present a budget-friendly alternative to our full in-house engine builds: the D&J HP...

The 5 Axis Intake Horn fits a 6.7 intake and can have a 3.5" or 4" vibrant clamp welded onto it. It does not have an oil dipstick relocation bracket. It will work in factory pickup, but will need some custom fabrication to make...

Billet Air Shut-Off Guillotine   Our Billet Air Shut-Off Guillotine is designed for high-performance applications, providing reliable performance, durability, and enhanced safety. Featuring a dual internal spring design and a 1/4-inch thick aluminum blade, this setup ensures efficient air shut-off when needed. It includes...

Billet Stage 2 P-Pump Intake Manifold The Billet Stage 2 P-Pump Intake Manifold is specifically designed to fit on our 24v cylinder head, providing a seamless integration with your engine setup. This intake manifold is compatible with all P-Pumps and VP-44 injection pumps and...

 Billet Valve Cover 03-05 Black Powder Coat Our Billet Valve Cover 03-05 is meticulously designed in-house to achieve the perfect balance of fit, finish, and functionality, all while keeping your budget in mind. Made from aircraft-quality 6061-T6 aluminum, these valve covers come complete with...

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:...

Cummins Billet Freeze Plugs Kit Introducing our newly designed Cummins Freeze Plugs that eliminate leaks! Our Billet Freeze Plugs kit features an innovative design that requires no drilling or tapping of the block. The freeze plugs are securely held in place using two bolts...

Cummins Billet Front Freeze Plug Introducing our newly designed Cummins Billet Front Freeze Plug that eliminates leaks! This innovative front freeze plug is designed to be securely held in place by a factory fan support, ensuring a reliable and leak-free performance. Included: 1 Front...

Cummins Billet Side Freeze Plug Introducing our newly designed Cummins Billet Side Freeze Plug that eliminates leaks! Our innovative design requires no drilling or tapping of the block. This side freeze plug is securely held in place using two bolts with O-ring seals and...

Cummins Billet Timing Cover Our Cummins Billet Timing Cover is expertly machined in-house from high-quality 6061 aluminum, ensuring durability and precision. This cover is designed for easy installation, allowing you to use the factory fan with the stock dampener and belt without any modifications....

Use only the best with our D&J Cummins Head Gasket Kit 1989-1998 5.9L 12V. Includes A head gasket, exhaust manifold gaskets, long intake gasket, air horn gaskets, injector install kit, and valve cover gaskets.

Use only the best with our D&J Cummins Head Gasket Kit 5.9 VP44 1998-2002 Includes a head gasket, exhaust manifold gaskets, long intake gasket, air horn gaskets, injector install kit with cross tube o-ring, and thermostat gasket.

D&J Precision Machine Dual CP3 Billet Timing Gear Housing Kit   D&J Precision Machine was the first to design and manufacture a billet timing gear housing to drive multiple CP3 pumps for the Cummins 5.9 and 6.7 Common Rail engines. Our customers were losing...

Stage 2 P-Pump Cummins Performance Head   Our Stage 2 P-Pump 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 P-Pump Billet Intake Manifold, thread-in soft plugs in the...

  D&J Precision Machine Oil Cap Cover Our D&J Precision Machine Oil Cap Cover is a great way to represent our brand. This cover is the same one included in our Billet Valve Cover items. Suit up your engine with our oil cap cover,...

Features Upgraded Valve Seats - Taller and larger than stock, made from heat-resistant alloy to prevent loosening and failure Improved Heat Dissipation - Larger seats distribute heat more efficiently into the casting, reducing the risk of cracking Genuine Cummins Valves - Ensures OEM-level durability...

Stage 2 VP44 Cummins Performance Head   Our Stage 2 VP44 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 VP44 Billet Intake Manifold, thread-in soft plugs in the...

Billet Direct Drive Mechanical Lift Pump Kit Say goodbye to the complications of dual electric lift pumps. Our Billet Direct Drive Mechanical Lift Pump Kit offers a streamlined solution with a robust 300GPH capacity, proven to support over 2200hp on one of our D&J...

Waterman Direct Drive Setup   No need to buy a whole new system when you can just buy the kit! Our Billet Direct Drive setup eliminates the complication of two electric lift pumps. It is capable of 300 GPH and engine dyno-proven to support...