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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
- OUR TOP PICK: Genuine Bosch Stock 505 Cummins Fuel Injector
- RUNNER-UP: BD-Diesel Dodge 5.9L Cummins 24v ISB Injector
- BEST BUDGET OPTION: Bosch 12 Valve 90 Horsepower Performance Injectors
Comparison of the Best 5.9L Cummins Injectors
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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
PROS
PROS
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.
Runner-up:
BD-Diesel Dodge 5.9L Cummins 24v ISB Injector
PROS
PROS
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)
PROS
PROS
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.
4. Industrial Injection Remanufactured Performance Injector
PROS
PROS
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
PROS
PROS
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
PROS
PROS
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.
7. Exergy Injectors (Set of 6)
PROS
PROS
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.
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.
Conclusion
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.
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