3rd gen 5.9 2003-2004

Introducing our in-house designed 03-05 Cummins billet valve cover, balancing fit, finish, functionality, and budget.  Superior Construction Material: Made from aircraft-quality 6061-T6 aluminum for exceptional durability and strength. Fasteners: Comes with all stainless steel fasteners to ensure longevity and resistance to corrosion. Advanced Baffle...

 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...

5.9 Common Rail Cummins Precision Plus Reman Long Block Our 5.9 Common Rail Cummins Precision Plus Reman Long Blocks come fully assembled, including the oil pan and front timing cover. We use only the best products from our years of experience in the high-performance...

  5.9 CR HP Reman Cylinder Head   Our 5.9 CR Performance Cummins Reman 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...

Heavy Hauler 5.9 Cummins Long Block Our Heavy Hauler 5.9 Cummins Long Blocks come fully assembled, including the oil pan, rear crank seal, front cover and crank seal, and oil filter housing, along with our Stage 1 High-Performance Cylinder Head. We include a street/towing...

5.9 CR Stage 1 Cummins Performance Head   Our 5.9 CR Stage 1 Cummins Performance Head is a step up in performance without the extra expense and work involved with an aftermarket intake. This head includes everything in our HP Reman Head along with...

Use only the best with our D&J Cummins Head Gasket kit 2007-2007 5.9 Common Rail. Includes genuine Cummins head gasket, exhaust manifold gaskets, long intake gasket air horn gasket, injector install kit with cross tube o-ring, rocker box gasket, and thermostat gasket.

5.9 Common Rail Head Gasket set with 4.305" x .105" rings 

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....

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 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 24v Heavy Duty 7/16" .168 Wall Push Rods   Our 7/16" .168 wall push rods for 24V Cummins engines provide unmatched strength and rigidity, making them ideal for both high-performance applications and daily driving. Proven to withstand up to 3000+ HP, these push...

D&J Precision Machine Cummins Titanium Retainers   Designed for 1998 and up 24v Cummins cylinder heads, our D&J Precision Machine Cummins Titanium Retainers are meticulously crafted in-house for superior performance. These valve spring titanium retainers are 10 grams lighter than the stock retainers, providing...

D&J Precision Machine Street Performance 5.9 Cummins Long Block   Our Street Performance 5.9 Cummins Long Blocks come fully assembled, including the oil pan, rear crank seal, front cover and crank seal, and oil filter housing. Featuring our X-Beam Stock Length Billet Rods and...

D&J Precision Machine Performance Series 5.9 Cummins Long Block   Our Performance Series 5.9 Cummins Long Blocks come fully assembled from the oil pan to the rocker box with our X-Beam Stock Length Billet Rods and our Stage 2 High-Performance Cylinder Head. We custom-build...

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 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...

D&J 5.9 Common Rail 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...

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...

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...