One-piece Cummins push rods for 24V engines. Produced from 4130 chrome molybdenum and heat treated to Rockwell Rc60 their advantage is strength and rigidity.

D&J designed this Cummins billet valve cover in house for the best balance of fit, finish, and functionality, while keeping your budget in mind. These valve covers are made from aircraft quality 6061-T6 aluminum, and come with all stainless steel fasteners. A baffle system...

D&J Precision Machine HD 115lb 24v Cummins Valve Springs have been proven with years of testing. We have seen over 120psi of boost on one of D&J Stage 3 cylinder heads with these springs. These are the same valve springs we included standard on...

Our Stage 2 Cummins Performance Head is designed for the performance enthusiast. Includes everything in our Stage 1 Cummins Performance Head and a D&J Stage 2 Billet Intake Manifold, thread in soft plugs in the head, titanium valve spring retainers, and heavy duty extra...

Our Stage 1 Cummins Performance Head is a step up in performance without the extra expense and work involved with an aftermarket intake. Our Stage 1 Cummins Performance Head includes everything in our Performance Cummins Reman Head along with 115 pound valve springs, 5...

Cummins Titanium Retainers for 1998 and up 24v Cummins cylinder heads. Out titanium retainers are 10 grams lighter than the stock retainers and are included standard on D&J Stage 2, Stage 3 and Stage 4 cylinder heads Cummins titanium retainers are recommended when over...

Our Cummins Reman Head has all the necessary upgrades to make your head durable and reliable. You’re given the option to use your own head or one of our head cores Head is disassembled and all soft plugs are removed Head is cleaned and...

The Strongest Billet Cummins Rods On The Market Proven over 3000hp and 4000tq our X-BEAM Billet Cummins Rods are designed with our unique ” X ” profile to maximize the strength while reducing weight. Our billet rods are made from extreme high impact tool...

D&J designed this Cummins billet valve cover in house for the best balance of fit, finish, and functionality, while keeping your budget in mind. These valve covers are made from aircraft quality 6061-T6 aluminum, and come with all stainless steel fasteners. A baffle system...

Our Stage 3 Cummins Performance Head is designed for the extreme high performance. Includes everything in our Stage 2 Cummins Performance Head, with a D&J Stage 3 Billet Intake Manifold, oversize super alloy intake and exhaust valves, thread in soft plugs in the head,...

Description D&J Precision Machine 6.7 Common Rail Cummins HP Reman Long Block. D&J 6.7 Common rail Cummins HP Reman Long Blocks come fully assembled including oil pan and front timing cover, using the best products we have found with years of experience in the...

D&J Precision Machine Street Performance 6.7 Cummins Long Block. Our Performance Street 6.7 Cummins come fully assembled including the oil pan rear crank seal front cover and crank seal, and oil filter housing. With our X-Beam Stock Length Billet Rods and our Stage 1...

HP Reman Extreme 6.7 Cummins Long Block. Our HP Reman Extreme 6.7 Cummins come fully assembled including the oil pan rear crank seal front cover and crank seal, and oil filter housing. With our Stage 1 High Performance Cylinder Head. We include a street/towing...