Best Injectors For 5.9 Cummins (1994-2007) (2023)

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We are willing to bet you have probably never considered upgrading your truck’s fuel injection system – you have most likely just always considered it an essential part of your engine, not something to play with. But did you know upgrades to stock fuel injectors can make your truck more powerful and more fuel efficient?

Read on to learn more about these super cool products!

At a Glance: Our Top Picks for Injectors For 5.9 Cummins

Comparison of the Best 5.9L Cummins Injectors


Our Top Pick

Best Injectors For 5.9 Cummins (1994-2007) (1)

  • Has a one year unlimited mileage warranty
  • Will address an engine that misfires randomly
  • Comes with o-rings and copper crush washers for installation
View Latest Price →

Best Injectors For 5.9 Cummins (1994-2007) (2)

  • Able to boost both engine power and efficiency
  • Included installation/removal tool makes set up easy
  • De-burred orifices will enhance flow and atomization
View Latest Price →

Best Budget Option

Best Injectors For 5.9 Cummins (1994-2007) (3)

  • Easy to install and easy to use
  • Produces a large amount of increased power
  • Sold individually, so will not need to purchase a set
View Latest Price →

Best Injectors For 5.9 Cummins (1994-2007) (4)

  • Will boost your engine’s miles per gallon
  • Comes with a one year unlimited warranty
  • Arrives with washers and o-rings for installation
View Latest Price →

Best Injectors For 5.9 Cummins (1994-2007) (5)

  • Has a one year unlimited mileage warranty
  • Comes with washers for quick and easy installation
  • Sold individually, so no requirement to purchase a full set
View Latest Price →

Best Injectors For 5.9 Cummins (1994-2007) (6)

  • Will boost your truck’s horsepower by 120
  • Comes with a two year unlimited warranty
  • Product is specifically designed for use when racing
View Latest Price →

Best Injectors For 5.9 Cummins (1994-2007) (7)

  • Does not produce any rattling or smoky haze
  • Injector set comes with a calibration summary
  • Injectors have unlimited nozzle flow increases for maximum power
View Latest Price →

What is the Purpose of an Injector?

An injector is responsible for doing just that: injecting! The injector is the component of your truck’s engine that actually supplies your car with fuel, as it injects fuel from the tank into the engine cylinders. Enhanced injection systems, such as the ones described in this article, can improve this process so that your truck is enabled with more power and even increased fuel economy as well. Some injectors can turn a tired old engine into a total beast!

How to Choose Injectors for a 5.9L Cummins

Injectors have a number of key attributes you should consider before purchasing. Here are some of the most important:

Increased Horsepower

Odds are, if you are interested in an injector beyond the stock system that comes with your vehicle, you are intrigued by the possibility of a more powerful truck. With that in mind, you should definitely look at how much horsepower a particular injector system will enable your engine to reach.

Ease of Installation

Installing an injector system is not exactly like replacing your windshield wiper fluid – injectors are an integral component of your engine and your truck literally will not be able to function if they are not installed properly. So make sure you find yourself a system that is straightforward and relatively simple to set up.

Fuel Economy

The best injectors will streamline the process of injecting fuel into your engine in such a manner that your engine will ultimately require less fuel to reach new heights of power. Make sure you find yourself an injector that can do this for your vehicle and save you a few dollars.

Review of the Best 5.9L Cummins Injectors

So now that you have a bit more familiarity with the concept of injectors, check out some of our top injector picks:

Best Overall:
Genuine Bosch Stock 505 Cummins Fuel Injector

Best Injectors For 5.9 Cummins (1994-2007) (8)


  • Increases truck’s fuel economy
  • Sold individually as opposed to a set
  • Bosch provides great customer service
  • Will fix your engine misfiring randomly


(Video) Are you ready for our INSANE 700+ HP 2007 5.9L Cummins build?! 💪

  • Injectors are remanufactured

The Genuine Bosch Stock 505 Cummins Fuel Injectors are some of the most high quality fuel injectors you will be able to find. Bosch really sets the industry standard when it comes to injectors, so when you buy real Bosch injectors, you know you are investing in a quality product. Bosch provides a number of convenience features with these injectors, including shipping the injectors with O-rings and copper crush washers already attached, so your new injectors will be immediately ready for installation when they first arrive.

Bosch also provides a one year unlimited mileage warranty with your purchase – but you certainly will not need it, these injectors will continue to work well even after your truck has accumulated a large amount of miles. And, if there is an instance where you do need to replace a broken injector, you can go ahead and repurchase from Bosch, because they sell their injectors individually, as opposed to a set. This will save you a significant amount of money in the long run.

Bottom Line

The Genuine Bosch Stock 505 Cummins Fuel Injectors are high quality, high performance fuel injectors. They are remanufactured, but that really only applies to their outer housing.

BD-Diesel Dodge 5.9L Cummins 24v ISB Injector

Best Injectors For 5.9 Cummins (1994-2007) (9)


  • Will boost fuel economy
  • Injector is flow enhanced
  • Has de-burred orifices to increase fuel flow and atomization
  • Comes with an installation/removal tool so that you will easily be able to set the system up yourself


  • Hose in kit is prone to leaking

The BD Diesel Injector Kit (100hp) is one of the most reliable injector products you will be able to find on the market today. BD has been producing automotive parts for almost fifty years, so you know that when you go with them, you are purchasing a high quality product that has been tried and tested.

These injectors are no different. BD will actually offer you the opportunity to send your old injectors in for testing so that they will be able to recommend a product that is best for your specific vehicle’s engine. And if you choose to go with the 100 horsepower boost, oh baby, watch out! These injectors will take your truck to new heights when it comes to engine power and efficiency.

Bottom Line

The BD Diesel Injector Kit (100hp) is a fantastic injector system from a tried and true, reliable automotive brand that will revolutionize your truck’s capabilities. Watch out for the kit’s hose, though – it may need patching.

Best for the Money:
Bosch 12 Valve 90 Horsepower Performance Injectors (Fits 1994 – 1998)

Best Injectors For 5.9 Cummins (1994-2007) (10)


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  • Durable
  • Easy to use/install
  • Come with clear instructions
  • Bosch provides good customer service


  • Injectors are remanufactured

The Bosch 12 Valve 90 Horsepower Performance Injectors are another example of a high quality Bosch product that will make your vehicle’s engine (not to mention you!) very happy. These injectors come with all the Bosch guarantees, so you know you are investing in a product that is built to go the distance.

Bosch injectors are straightforward to install and to use, meaning you will not need to spend a large amount of time or potentially money to take your car down to the local mechanic to get these bad boys up and running. The injectors will provide noticeable boosts in power to your vehicle, bringing it up to the way it functioned when you first bought it. These injectors are particularly unique if you have made any modifications to your engine that may require increased fuel – never fear, these injectors have you covered.

Bottom Line

The Bosch 12 Valve 90 Horsepower Performance Injectors are an amazing injector investment to make, as they will really wake up your vehicle, particularly if you have made any modifications to your engine. They are remanufactured (as are many Bosch products), but they will function as if they are completely new.

See Comparison Table →

4. Industrial Injection Remanufactured Performance Injector

Best Injectors For 5.9 Cummins (1994-2007) (11)


  • Boosts truck’s power
  • Will increase fuel economy
  • Has multiple performance levels
  • Has a one year unlimited warranty
  • Industrial Injection provides good customer service


  • Will increase your truck’s emissions

The Industrial Injection Remanufactured Performance Injector is a fantastic injector that will bring your truck to a level even higher than it was at when you first bought it! Forget waking your truck up – how about feeling like you are driving a whole new vehicle? Industrial Injection will provide all that and more for you with their Remanufactured Performance Injector.

This injector will boost your engine’s miles per gallon by up to three miles, and will make your truck engine run more smoothly for an additional 250,000 miles. It comes with everything you could possibly need for installation, including washers and O-rings, so you will not need to be stressed out at all during the set up process. And if anything does somehow go wrong with that situation, you will not need to worry – Industrial Injections sells their products with a one year unlimited warranty, so you can always return your injector right away.

Bottom Line

The Industrial Injection Remanufactured Performance Injector is a great injector that will take your truck to new heights in terms of power and fuel efficiency. It will increase your truck’s emissions, though.

5. Industrial Injection Race / Dragon Flow Injectors

Best Injectors For 5.9 Cummins (1994-2007) (12)

(Video) Firepunk Diesel Street/Track 47RE/48RE Dodge Cummins Transmission| XDP Q&A


  • Will increase your truck’s power
  • Sold individually, not as a full set
  • Come with washers for easy installation
  • Industrial Injection provides great customer service
  • Come in a variety of different levels: race levels 1-8


  • Will increase your truck’s emissions
  • Injectors at Race level 4 and higher will require vehicle modifications

The Industrial Injection Race / Dragon Flow Injectors are a set of injectors that will be able to take your truck to the next level – literally! These injectors are sold in a variety of different levels so that you can specifically choose what would work best for your truck and your needs as a driver. The Race Levels of these injectors start at 1 and go up to 8, with any level higher than 4 requiring some truck modifications beyond the stock engine. Being able to choose at what level you would like your truck to increase its power to is an option not provided by any other manufacturer on this list! As a bonus, these injectors are easy to install and will not cause a complicated process that will result in frustration. If you want an option that you can fully customize to your specific truck, you need to go with the Industrial Injection Race / Dragon Flow Injectors!

Bottom Line

The Industrial Injection Race / Dragon Flow Injectors are a great set of injectors with levels that you can set, depending on how much more power you want your truck to have. Some levels will require vehicle modifications, though.

6. Dynomite Diesel Products Injector SET - 120HP

Best Injectors For 5.9 Cummins (1994-2007) (13)


  • Can tow light loads
  • Boosts truck horsepower by 120
  • Specifically designed for race use
  • Has a two year unlimited warranty


  • Need to fill out a race waiver to buy
  • Will significantly increase your truck’s emissions
  • Product installation may void your truck’s warranty

It is true that on face value, there may be many more cons than pros to investing in he Dynomite Diesel Products Injector SET – 120 HP. You will need to fill out a race waiver in order to purchase these injectors from most manufacturers. There are many states that have banned the sale of these injectors entirely, and many more states that do not allow vehicles with these injectors to drive on public roads and restrict the trucks with this system to off-road or race locations instead.

And, installation of this product is entirely manual and will more likely than not entirely void your truck’s warranty (if the warranty is even still active on a truck of that age).

All of this to say…if you are looking for the biggest, baddest injectors on the market, you will not be able to find one better that the Dynomite Diesel Products Injector SET. These injectors will boost your truck’s horsepower by 120 and produce a noticeable smoke haze while you are revving your engine. If you have always wanted to drive the most intimidating truck on the road, these injectors are the best choice for you.

Bottom Line

The Dynomite Diesel Products Injector SET – 120 HP is a monster of a injector system that will turn your truck into a total beast. It does have some inconvenience features though, like needing to fill out a race waiver before you buy.

(Video) Firepunk Diesel Competition Stage 3 47RE/48RE Dodge Cummins Transmission | XDP Q&A

7. Exergy Injectors (Set of 6)

Best Injectors For 5.9 Cummins (1994-2007) (14)


  • Injectors will run smoothly
  • Comes with a calibration summary
  • Has unlimited nozzle flow increases
  • Exergy provides fantastic customer service
  • Will not produce any rattling or smoky haze


  • Will not pass a California smog check

If you are looking for the most reliable, guaranteed to be high functioning injectors available on the market today, look no further than the Exergy Injectors (Set of 6). Exergy has taken a number of steps to ensure their products are the absolute best. These include measuring and correcting their injector sets for proper operation at all power ranges, from idling all the way up to maximum power.

When you buy an injector set from Exergy, you know your injector system will always be performing at its absolute best. And you know that such performance will always be consistent: Exergy Injectors have all been balanced within 4% of each other, so every time you choose an Exergy Injector you can expect the same standard of excellence.

Additionally, Exergy will go the extra mile for their customers and fully map your injector set to maximize your system for your specific vehicle. There really is not much to dislike about an Exergy Injector set!

Bottom Line

The Exergy Injectors (Set of 6) are the most reliable, high quality injectors you will be able to find. But be forewarned, if you happen to live in California: they will not pass California emissions tests.

See Comparison Table →

How to Spot a Clogged Injector

In order to spot a clogged injector, you will need a pressure gauge and a fuel injector tester. Find your fuel pressure port on your fuel rail and remove the plastic cap. Attach your fuel pressure gauge to the port. Your truck’s manual should list the ideal pressure for your engine. Turn your engine on and observe the gauge.

It can also be helpful to cycle your engine on and off a few times to ensure you are getting an accurate reading. If your fuel pressure is not ideal, it could very well be because of a clogged injector.

Connect your fuel injector tester to the fuse box system. Use the tester to send a pulse, and measure the impact on your pressure gauge. Do this with all of your fuel injectors – if one has a noticeably different impact on the gauge, that one is likely clogged. Check out the video below for a more in-depth overview of what was just described.


Fuel injectors can take a tired old engine and breathe new life and power into it – in some cases, maybe taking it to a level where it isn’t even street legal to drive anymore! Whatever your desire for your engine, whether it is turning it into a beast or just giving it a little more oomph, a fuel injector can help you get there.

See Comparison Table →

Related Buyer Guides

(Video) Chronicles Of An 03 Cummins Rebuild -Part 49- Flex Plate / Flywheel Install


When should you replace injectors on 5.9 Cummins? ›

Fuel injectors for the Dodge Cummins 5.9L should last between 200,000 and 300,000 kms when properly treated.

What do bigger injectors do for Cummins? ›

Bigger Injectors Are Quicker-Firing Injectors

The key to “bigger injectors” is more than simply higher fuel volume. Thanks to larger nozzles and the appropriate injector body work, the added fuel can be injected quicker.

Is upgrading fuel injectors worth it? ›

A new or upgraded fuel injector can improve engine performance, reduce diesel emissions, and increase the uptime of your truck. Don't wait for a better system to come on the market, though, because when it's worn out, part of the fuel injector – or even the entire system – should be replaced.

How do I choose injectors? ›

Fuel Injectors are sized by their flow rate. Flow rate is a measurement of how much fuel can be delivered over time. It is listed in pounds per hour (lbs./hr.) or cubic centimeters per minute (cc/min.). The right size injector can supply enough fuel under full load conditions at an 80% duty cycle.

Will bigger injectors increase HP? ›

Larger throttle body and injectors

Depending on what type of engine you have, you can gain as much as 10-20 more horsepower and comparable torque. There is a catch, however. Go too large and you can lose power.

What are the best injectors for a 5.9 Cummins? ›

From our experience in the diesel repair and performance industry we feel that the best injector you can purchase for your 5.9 or 6.7L Cummins is the Genuine Bosch Injector.

How do I know if my 5.9 Cummins has bad injectors? ›

Symptoms of Failing Dodge Cummins Fuel Injectors
  1. Excessive Smoke.
  2. Power Loss.
  3. Rough Idle.
  4. Fuel in Oil.
  5. High Return Fuel.
  6. No Start.

Will seafoam clean diesel injectors? ›

Pour Sea Foam in your fuel tank to clean and lubricate your entire fuel system. It works through fuel injectors and carburetors to remove harmful residues and deposits from fuel passageways, intake valves, pistons, and chamber areas.

Will bigger injectors hurt mpg? ›

Larger injectors will not change the fuel mileage unless you demand more power from the engine by pushing the gas pedal to the floor in which case you will burn more fuel, On modern engines, the computer controls how much fuel the engine burns under load and rich lean conditions.

Will better fuel injectors increase mpg? ›

Fuel injectors are responsible for spraying a mist of fuel into the engine. The finer and more controlled the spray, the better the fuel economy. Add a bottle of fuel injector cleaner to your gas on your next fill-up. Doing this once a year can significantly improve your fuel injector's performance.

Do I need bigger injectors for turbo? ›

If you've added a turbo, a higher flowing fuel pump, a bigger exhaust and remapped your computer, you're going to need bigger fuel injectors.

What happens when you upgrade fuel injectors? ›

In reality, if your car is modified to the point at which you need upgraded fuel injectors, you realistically need an upgraded fuel delivery system for optimum results. If done right, an upgraded fuel system will create an atmosphere where the engine can make more power, reliably and efficiently.

When should I upgrade my injectors? ›

How To Tell When You Need Bigger Injectors [HPA Q&A] - YouTube

When should fuel injectors be replaced? ›

Because most fuel injectors are only replaced every 50,000 to 100,000 miles when the vehicle is in a severe driving scenario mixed with a lack of maintenance, most require comprehensive repair.

What pound injectors do I need? ›

The simple formula is horsepower times BSFC – or 500 horsepower x 0.5 = 250 lbs/hr of fuel. This is the amount of fuel we need to supply to the engine to achieve 500 hp. If we divide that volume by eight injectors (for a V8 engine), this comes to 31.25 lbs/hr necessary to feed the engine.

Does it matter what fuel injector I use? ›

Without the right fuel injector, the car engine may not start or it may overflow, resulting in wastage of gas. In most of the cars, the stock fuel injector is sufficient. However, if you want to make changes to your car, you have to upgrade the fuel injector accordingly to realize the turbo power.

What to add to fuel to clean engine? ›

Table of contents
  1. Editor's Pick: Chevron Techron Concentrate Plus Fuel System Cleaner. ...
  2. Red Line Complete SI-1 Fuel System Cleaner (60103)
  3. Royal Purple Max-Clean Fuel System Cleaner and Stabilizer (11722)
  4. Liqui Moly Jectron Fuel Injection Cleaner.
  5. Sea Foam Motor Treatment (SF-16)
20 Aug 2021

What happens if you put bigger injectors on stock engine? ›

Bigger injectors will deliver more fuel, but in petrol engines this means more air is needed to keep the mixture at the best combustion ratio. So if you turbo charge, or supercharge, the bigger injectors will give more power. Otherwise they will decrease power and waste fuel, like running constantly on the choke.

How can I increase the power of my diesel engine? ›

Here are six tips to help boost your diesel performance:
  1. Use Diesel Fuel Additives. ...
  2. Consider Diesel Tuners. ...
  3. Install Performance Air Filters & Cold Air Intakes. ...
  4. Upgrade the Exhaust System. ...
  5. Use DPF, DEF, and EGR Delete Kits. ...
  6. Upgrade your Diesel Fuel Injectors. ...
  7. Install a Turbocharger. ...
  8. Schedule Regular Diesel Engine Tune Ups.
6 Jun 2018

How do you increase torque? ›

An effective modification that will increase torque significantly is to install a turbo or supercharger. Forced induction forces air into your engine, increasing the power the engine provides. Depending on the torque curve you prefer, a turbocharger will need time to spool before it provides torque benefits.

What HP are stock 5.9 Cummins injectors? ›

Description. This is a genuine Bosch brand NEW injector for 1998.5-2002 5.9L 24 Valve Cummins with automatic transmission. This is for stock engines which are 235 horsepower equipped with an automatic transmission. These injectors are brand new so there is NO core charge.

How many injectors does a 5.9 Cummins have? ›

2003-2007 CUMMINS 5.9L

There are six individual solenoid actuated high-pressure fuel injectors. The injectors are vertically mounted into a bored hole in the top of the cylinder head.

What happens if you run a diesel with a bad injector? ›

If you have one or more faulty fuel injectors — due to wear or mechanical or electrical issues, driving for a long time can cause several problems: Stalling or failure for your car to start. Flooding of your engine. Pre-ignition of your fuel.

How can I test my diesel injectors at home? ›

Diesel Fuel Injector Test (Mechanical) - YouTube

What does a bad diesel injector sound like? ›

If a diesel injector, then the old mechanical type could make loud metal-metal sounds, though haven't read of that. More commonly, a bad diesel injector spray can cause the combustion to make what is described as a “nailing” sound, like someone is tapping the engine with a hammer.

What is the best diesel additive for injectors? ›

Diesel Extreme is the best additive in the game. This one adds seven points to diesel's cetane score (which again improves the fuel's combustion performance), and it cleans and lubricates injectors and other critical fuel system components. Diesel Extreme also helps remove excess water and contaminants from fuel.

Will transmission fluid clean diesel injectors? ›

Yes, but don't over do it. ATF is a great injector cleaner. Diesel is an oil, but it can gum up the injection system. The ATF will scrub the inside clean.

How do you clean diesel injectors without removing them? ›

How to clean diesel fuel injectors without removing parts - YouTube

Who is the injector Bunny? ›

@injectorbunny. Erika is one of the top aesthetic injectors in the country. She serves as an international trainer for industry leaders such as Merz, Allergan, and Galderma, where she's also recognized as an expert faculty.

How do I know which Bosch fuel injector I have? ›

The reference number of Bosch injectors are located on the head near the electric plug, the number starts with: 0 445 110 xxx - 0 445 115 xxx - 0 445 116 xxx - 0 445 117 xxx - 0 445 120 xxx - 0 445 124 xxx - etc...

What should be in an injector case? ›

The injector case is a container with the purpose of saving space within the players inventory. The item provides 9 inventory slots and takes up 1 inventory slot itself. Only Morphine injectors and Stimulators can be stored in it.

Where can I find tarkov injectors? ›

Adrenaline injector (Adrenaline) is a Medical item in Escape from Tarkov.
  • In Buried barrel caches.
  • In Ground caches.
  • In Medbag SMU06.
  • In Medical supply crates.
  • In Sport bags.

What is a master injector? ›

A master injector is a credentialed medical professional with a track record of creating exceptional results and prioritizing patient safety. Characteristics of a master injector include: Experience administering aesthetic injections. Skill in safely producing desired results.

Do Bosch diesel injectors need coding? ›

The typical length is 6 digits and is located on the injector head. BOSCH Common Rail Injectors - generally all require coding, although some older versions may not. In simple terms, if the IMA code is present, then the injector will need coding.

How can you tell a fake Bosch injector? ›

How to identify fake versus genuine Bosch 210 injectors - YouTube

How can you tell a fake Bosch? ›

To verify whether the product is genuine, first check the holographic properties of the Bosch Secure Code Label. For genuine Bosch products, the secure code and logo on the Bosch Secure Code Label should glimmer in rainbow colours when it is exposed to direct light.

Are tarkov injectors real? ›

This is not real: In the video, it becomes clear that many of the medical aids mentioned are also used in reality, only one is fictitious. The Regeneration Stimulant Injector, ETG-e for short, does not exist.

Where can I find Zagustin? ›

Zagustin hemostatic drug injector (Zagustin) is a Medical item in Escape from Tarkov.
  • In Buried barrel caches.
  • In Ground caches.
  • In Medbag SMU06.
  • In Sport bags.

Where is morphine in customs? ›

Guide. One of the best places to find morphine is at the Health Resort on Shoreline as it has a large amount of Medbag SMU06 and Medcases. Another great spot for morphine is in the medical building on Customs on the 2nd floor of the building.

What quest gives you injectors case? ›

From a purely rewards perspective, completing Out of Curiosity is a clear winner, giving you an Injector Case which is not only one of the strongest items in the entire game, but also worth 1,000,000₽ on the Escape From Tarkov flea market.


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