D&J PRECISION MACHINE
If you’re looking for high quality and personal service, you’ve come to the right place. At D&J Precision Machine LLC, we’re about giving you the attention and personal service you’ll come to expect and enjoy.
We offer the best in services. At D&J Precision Machine, our goal is to make our customers satisfied with our expertise level of knowledge and service in the diesel performance industry. We build crate engines and cylinder heads, and those very same engines are in some of the fastest Cummins-powered diesel trucks in the nation. We will suit your needs from street to speed with attention to detail and precision to ensure your engine will perform to the best of its abilities.
Our rates are competitive, with no hidden fees. Our employees are friendly and will be there to help you every step of the way.
Let us put our experience to work for you.
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D&J PRECISION MACHINE 9/16×6.5 INCH HEAD STUD KIT 24V
D&J PRECISON MACHINE
$1,150.00D&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. We’ve had these head studs in 3000 HP engines with no...$1,150.00 -
D&J PRECISION MACHINE CUMMINS BILLET TIMING COVER 2003+
D&J PRECISON MACHINE
$425.00CUMMINS 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 billet timing cover kits come standard with stainless...$425.00 -
D&J PRECISION MACHINE CUMMINS OIL CAP COVER
D&J PRECISON MACHINE
$38.50Using 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 catch all the eyes with it, and the best part is,...$38.50 -
D&J PRECISION MACHINE ANODIZED BILLET D&J PRECISION MACHINE CAP COVER
D&J PRECISON MACHINE
$38.50Our 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 website. Suit up your engine with our oil cap cover...$38.50 -
D&J PRECISION MACHINE ANODIZED BILLET STAINLESS DIESEL OIL CAP COVER
D&J PRECISON MACHINE
$38.50Using 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 right on the top! You’ll catch all the eyes with it,...$38.50 -
D&J PRECISION MACHINE CUSTOM LED CUMMINS BILLET VALVE COVER 06-UP CUMMINS
D&J PRECISON MACHINE
$1,200.00Custom 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. We designed it to clamp the valve cover wiring...$1,200.00 -
D&J PRECISION MACHINE 03-05 DODGE CUMMINS BILLET VALVE COVER
D&J PRECISON MACHINE
$575.00We 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 from aircraft quality 6061-T6 aluminum, and come...$575.00 -
D&J PRECISION MACHINE BILLET VALVE COVER 06 TO PRESENT YEAR DODGE CUMMINS
D&J PRECISON MACHINE
$575.00We 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...$575.00 -
D&J PRECISION MACHINE BILLET VALVE COVER 06 – PRESENT YEAR BLACK POWDER COAT
D&J PRECISON MACHINE
$698.00We 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 6061-T6 aluminum, and come with all stainless steel...$698.00 -
D&J PRECISION MACHINE BILLET VALVE COVER 03-05 BLACK POWDER COAT
D&J PRECISON MACHINE
$698.00We 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 quality 6061-T6 aluminum and come with all stainless steel...$698.00 -
D&J PRECISION MACHINE WATERMAN MECHANICAL LIFT PUMP KIT
D&J PRECISON MACHINE
$1,699.00There’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 our D&J ENFORCER Longblocks. KIT...$1,699.00 -
D&J PRECISION MACHINE WATERMAN MECHANICAL LIFT PUMP KIT (EXCL. COVER)
D&J PRECISON MACHINE
$1,275.00Are 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! There’s no more need for the complication of two electric...$1,275.00 -
D&J PRECISION MACHINE X-BEAM 1.000″ LONGER BILLET CUMMINS RODS
D&J PRECISON MACHINE
$3,750.00Proven 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. Our billet rods are made from extreme high impact tool...$3,750.00 -
D&J PRECISION MACHINE X-BEAM STOCK LENGTH BILLET CUMMINS RODS
D&J PRECISON MACHINE
$3,395.00The 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 while reducing weight. Our billet rods are made from...$3,395.00 -
D&J PRECISION MACHINE BILLET 5.9 CUMMINS GRID HEATER DELETE
D&J PRECISON MACHINE
$60.00Billet 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 may or may not start without being plugged in below 20...$60.00 -
D&J PRECISION MACHINE 0.500″ TALLER BILLET 5.9 CUMMINS GRID HEATER DELETE
D&J PRECISON MACHINE
$112.500.500″ 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 leaks. * Not recommended for cold climates. Truck...$112.50 -
D&J PRECISION MACHINE FSR 6.7 CUMMINS PISTONS
D&J PRECISON MACHINE
$2,450.00High-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 manufacturers, these precision machine pistons are at the...$2,450.00 -
D&J DJPCNC100239 5.9 FSR (FORGED STEEL RING) PISTON 2003-2007 CUMMINS 5.9L 24V
D&J PRECISON MACHINE
$2,460.00High-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 engine component upgrade. These precision-machined...$2,460.00 -
D&J DJPCNC100207 TOOL STEEL WRIST PINS 1989-2007 CUMMINS 5.9L 12V/24V
D&J PRECISON MACHINE
$469.995.9 Cummins Tool Steel Wrist Pins D&J Precision Machine makes our tool steel wrist pins in our own facility right here in the United States. We source the highest quality materials. We have used our years of experience pushing the limits in high...$469.99 -
D&J DJPCNC100208 TOOL STEEL WRIST PINS 2007.5-2018 CUMMINS 6.7L 24V
D&J PRECISON MACHINE
$469.99Product 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 WARNING: Cancer and Reproductive Harm - www...$469.99 -
D&J DJPCNC100006 BILLET STAGE 2 INTAKE MANIFOLD 2003-2007 CUMMINS 5.9L 24V
D&J PRECISON MACHINE
$1,049.99The 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 horn locations and fuel setups. It comes with...$1,049.99 -
D&J DJPCNC100008 BILLET STAGE 2 P-PUMP INTAKE MANIFOLD 1998.5-2002 CUMMINS 5.9L 24V
D&J PRECISON MACHINE
$1,399.99The 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 pressure and intake air sensor ports in the rear and has...$1,399.99 -
D&J DJPCNC100242 BILLET SIDE FREEZE PLUG 1989-2024 CUMMINS 5.9L/6.7L 12V/24V
D&J PRECISON MACHINE
$49.99Introducing 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 have developed a design that uses a center bolt...$49.99 -
D&J DJPCNC100089 BILLET FRONT FREEZE PLUG KIT 1989-2024 CUMMINS 5.9L/6.7L 24V
D&J PRECISON MACHINE
$49.99Introducing 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 Billet Freeze Plug HD O-Ring WARNING: Cancer and...$49.99 -
D&J DJPCNC100092 BILLET FREEZE PLUG KIT 2003-2018 CUMMINS 5.9L/6.7L 24V
D&J PRECISON MACHINE
$184.99Introducing 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 the block, we developed a design that uses a center...$184.99 -
D&J DJPCNC100227 CUMMINS BILLET REAR FREEZE PLUG 2003-2024 CUMMINS 5.9L/6.7L 24V
D&J PRECISON MACHINE
$79.99The 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 - www.P65Warnings.ca.gov$79.99 -
D&J DJPCNC100273 BILLET AIR SHUTOFF GUILLOTINE
D&J PRECISON MACHINE
$574.00Diesel 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 seeking an effective air shut off guillotine solution...$574.00 -
D&J DJPDHSP115KIT 115LB 24V CUMMINS VALVE SPRINGS 1998.5-2024 CUMMINS 24V
D&J PRECISON MACHINE
$389.99D&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 springs we included standard on our Stage 1, Stage 2,...$389.99 -
D&J DJP100001 HEAVY DUTY 7/16″ .168 WALL PUSH RODS 1998.5-2018 CUMMINS 5.9L/6.7L 24V
D&J PRECISON MACHINE
$314.99Our 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. Specs of Push Rods: 7/16” diameter .168...$314.99 -
D&J DJPCNC100216 TITANIUM VALVE SPRING RETAINERS 1998.5-2024 CUMMINS 5.9L/6.7L 24V
D&J PRECISON MACHINE
$369.99D&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 the stock retainers. Our Cummins Titanium...$369.99 -
D&J DJPCNC100297 BILLET AIR SHUTOFF GUILLOTINE W/VELOCITY STACK
D&J PRECISON MACHINE
$799.99Diesel 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 become more than just upgrades; they become essential...$799.99 -
D&J DJPCH100074 PERFORMANCE REMAN HEAD 1989-1998 CUMMINS 5.9L 12V
D&J PRECISON MACHINE
$1,650.00Our 12v Performance 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...$1,650.00 -
D&J DJPCNC100167 BILLET TIMING COVER CR 2003-2018 CUMMINS 5.9L 24V
D&J PRECISON MACHINE
$439.99Cummins 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 billet timing cover kits come standard with stainless...$439.99