Black Friday 2025

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...

The Strongest Billet Cummins Rods On The Market   Our stock length X-BEAM Billet Cummins Rods are proven to withstand over 3000hp and 4000 lb/ft. We design these rods with our unique "X" profile to maximize strength while reducing weight. Made from extreme high...

12v HP Reman Cylinder Head   Our 12v Performance Cummins Reman Head is engineered with the highest standards of durability and reliability. Each head undergoes a meticulous remanufacturing process to ensure top-tier performance. Remanufacturing Process: Brand New Casting: Starting with a brand new casting...

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...

VP44 24v HP Reman Cylinder Head   Our VP44 24v 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 and...

Stage 2 5.9 CR Cummins Performance Head Our Stage 2 5.9 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 5.9 CR Billet Intake Manifold, thread-in soft plugs...

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...

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...

Performance Series 5.9 CR 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, performance focused alternative to our full in-house engine builds: the Performance...

6.7 CR Stage 1 Cummins Performance Head Our 6.7 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 105-pound...

D&J 2007.5-2018 6.7 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...

Performance Series 6.7 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 Performance Series Block. Key...

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...

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...

  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...

  5.9 Cummins Tool Steel Wrist Pins   D&J Precision Machine manufactures our tool steel wrist pins in-house at our facility in the United States, using the highest quality materials. Leveraging years of experience in high-performance diesel technology, we have designed these wrist pins...

D&J Precision Machine 6.7 Cummins Tool Steel Wrist Pins   D&J Precision Machine manufactures our tool steel wrist pins in-house at our facility in the United States, using the highest quality materials. Leveraging years of experience in high-performance diesel technology, we have designed these...

Stage 3 6.7L Cummins Performance Head Our Stage 3 Cummins Performance Head is designed for extreme high performance. It includes everything in our Stage 2 Cummins Performance Head, along with a D&J Stage 3 Billet Intake Manifold, oversize super alloy intake and exhaust valves,...

Stage 4 6.7L Cummins Performance Head Our Stage 4 Cummins Performance Head is designed for extreme high performance. It includes everything in our Stage 3 Head, along with a D&J Stage 4 Billet Runner Style Intake Manifold. This head can only be used with...

D&J 12v 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 Reman...