D&J PRECISON MACHINE

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

0.500″ Taller Billet 5.9 Cummins Grid Heater Delete suited for 1998.5-2007 Dodge 5.9L Cummins Diesel. Extra clearance Billet aluminum Get more airflow into your engine and avoid boost...

We designed our 03-05 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...

D&J Precision Machine Cummins Titanium Retainers for 1998 and up 24v Cummins cylinder heads. Our valve spring titanium retainers are proudly made in-house and they are 10 grams lighter than...

Our 7/16″ .168 wall push rods for 24V engines have the advantage of  strength and rigidity. They have been proven to 3000+ HP and are still good for your daily driven truck...

Our D&J Precision Machine branded 5.9 Cummins Tool Steel Wrist Pins come in a complete set of 6. Dimensions 3.250″ Length 1.575″ Outer Diameter, 0.330″ Wall...

Product Description Complete set of 6. 6.7 Cummins Tool Steel Wrist Pins Specs of 6.7 Cummins Tool Steel Wrist Pins: 3.550″ length 1.575″ Outer Diameter, 0.437″ Wall...

D&J Precision Machine 9/16×6.5″ head stud kit. These head studs are custom made by ARP. The nuts and washers are machined by us to ensure clearance for rocker box and pedestals...

Our D&J Precision Machine Oil Cap Cover is one of the best ways to represent our brand. This is the same oil cap cover that is already included in our Billet Valve Cover items on our...

Using a Stainless Diesel oil cap cover is a great way to represent your diesel pride. Suit up your engine with an oil cap cover with a Stainless Diesel logo engraved...

Billet 5.9 Cummins Grid Heater Delete for 1998.5-2007 Dodge 5.9L Cummins Diesel. 6061 aluminum Get more airflow into your engine and avoid boost leaks. * Not recommended for cold climates. Truck...

Diesel engines need reliable components to ensure safety and performance, among which air flow regulation is critical. The D & J Diesel turbo guillotine stands as an exceptional choice for those...

Diesel engines rely heavily on precise airflow management to achieve peak performance and efficiency. By integrating a high-quality air shut-off valve with a velocity stack, diesel performance parts...

The Billet Stage 2 Intake Manifold is designed for our Stage 2 cylinder heads. They are sold with either 5.9 intake and fuel or 6.7 intake and fuel setups. These intakes utilize the stock intake...

The Billet Stage 2 P-Pump Intake Manifold is designed to fit on our 24v cylinder head. It will clear all P-Pumps and VP-44 injection pumps. It is set-up for a 5.9 intake. There are boost...

CUMMINS BILLET TIMING COVER Our Cummins Billet Timing cover is machined in-house from 6061 aluminum. It is designed to use factory fan with stock dampener and belt without modification. Our Cummins...

We designed our Billet Valve Cover 03-05 in house for the best balance of fit, finish, and functionality, while keeping your budget in mind.   These valve covers are made from aircraft...

We 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...

We designed the 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...

Introducing our newly designed Cummins Freeze Plugs that do not leak! The newest design of our Billet Freeze Plugs kit do not require drilling and tapping of the block. To hold the freeze plug within...

Introducing our newly designed Cummins Billet Front Freeze Plug that does not leak! Our billet front freeze plug is designed to be held in by a factory fan support. Included: 1 Front...

The Cummins common rail ’03-to-current billet rear freeze plug takes care of the common issues of high coolant pressure. It bolts in the back of the block. WARNING: Cancer and Reproductive Harm...

Introducing our newly designed Cummins Billet Side Freeze Plug that does not leak! The newest side freeze plug design that we have created does not require drilling and tapping of the block! We...

CUMMINS BILLET TIMING COVER Our Cummins Billet Timing cover is machined in-house from 6061 aluminum. It is designed to use factory fan with stock dampener and belt without modification. Our Cummins...

Using a Cummins oil cap cover is a great way to represent Cummins pride. Suit up your engine with an oil cap cover with a Cummins logo engraved right on the top! You’ll...

Custom LED Cummins Billet Valve Cover fits 2006+ Cummins. Unlike the other billet valve covers on the market we designed our Custom LED Cummins Billet Valve Cover with function first...

High-performance pistons are critical for enhancing the power and reliability of a diesel engine. FSR 5.9 Cummins Pistons are designed to meet the demands of diesel enthusiasts seeking a significant...

High-performance diesel engines require robust components to deliver top-tier results. Our 6.7 Cummins Pistons exemplify the fusion of precision engineering with durability. Crafted by expert...

There’s no more need for the complication of two electric lift pumps. Our Billet Direct Drive Mechanical Lift Pump kit is capable of 300GPH and has been proven to support over 2200hp on one of...

Are you looking for a Waterman Mechanical Lift Pump kit, but already have your own cover? No need to buy a whole new one when you can just buy the kit excluding it, right? Well, here you go!...

Proven over 3000hp and 4000tq, we design  our X-BEAM Billet Cummins Rods with our unique “X” profile. This maximizes the strength while reducing weight as much as possible...

The Strongest Billet Cummins Rods On The Market Proven over 3000hp and 4000tq, we design our X-BEAM Billet Cummins Rods with our unique “X” profile to maximize the strength...