5 Best Diesel Tuner For 6.7 Cummins

Do you want to enhance the performance and power of your 6.7 Cummins? The best way to do this is by using a diesel tuner.
You might know what a diesel tuner is, but do you know that it does more than maximize the power of your engine?
A diesel tuner is an all-rounder device that reduce the car sputters.  With the right diesel tuner, you can peacefully drive your vehicle without worrying about the condition of your engine.
This article focused on finding the best diesel tuner for 6.7 Cummins and the factors to choose the correct one.

Best Choice


Edge Diesel Evolution CTS2

Premium Choice


Edge Products 31507

Best in Budget


Edge Products 84030 Insight Monitor

Best Diesel Tuner for 6.7 Cummins

You will find several options for diesel tuners, even if you are especially searching for one for 6.7 Cummins. With so many options in the market, selecting only one is very tricky.

You will have different companies promising numerous features of their products. That will create immense confusion in your mind about which diesel turner will be best for 6.7L Cummins.

We understand the dilemma you will be in, and that is why we are here to help you out. Below we have listed five of the best diesel tuners for 6.7 Cummins. This list will help you decide which tuner will be the best for you out of the lot.

1. Edge Products 31507 Ram 6.7l Juice With Attitude Cts2


  • Power gains are very high
  • Shift on the fly
  • CARB is exempted
  • The monitor has a high resolution
  • Can update product using internet


  • Cannot delete any element
  • Very expensive

Edge Products is a well-known brand that sells programmers, monitors, intakes, and other accessories for diesel and gas trucks. If you are looking for the best diesel tuner for 6.7 Cummins, then you will surely get it at Edge Products.

The Edge Products 31507 is the most expensive tuner on the list. That is because the 31507 is a premium product that is both a monitor and an in-cabin controller. You can view the performance of the truck on the monitor along with other parameters.

The monitor is a very convenient touch screen. It is one of the most suitable tuners for 6.7 Cummins. With the tuner, you get a maximum of 150 HP and a 350 lb-ft increase. However, this might change based on the model of your truck.

You can access five free tunes, and you can unlock the sixth one for an additional fee.

The Edge Products 31507 tuner allows you to go back to the factory or stock tune. However, using the pre-loaded tunes would be more effective in enhancing the performance. The tuner also comes with safety features like a turbo timer, cold-engine protection, etc.

You will see an HDMI-style spark plug that you can use to hook up EAS and accessories. There are five swipe screens, and the feature of light dim during the night. The device comes packed with screen layouts, customizable background, and needle style.

With so many features, it is hard to ignore this tuner despite its high price tag.


  • High-Resolution Monitor: Effective for easy readability
  • Easy Update: Can update the product using the internet
  • Versatile Measurements: Easy switch between Imperial and Metric measurements
  • Safety Features: Prevents overheating of the engine and backdowns

The Edge Products 31507 is an all-rounder performer, and you can never go wrong with it. You get to customize the display according to your liking, which is something not all devices provide. Furthermore, the ability to go back to stock form and the numerous maps provided is commendable.

2. 85401 Edge Diesel Evolution CTS2


  • Helps in gaining more power
  • Exceptional fuel economy
  • Improves the mileage
  • Easy installation
  • Accurate readings


  • The device may reset the car often

We have already reviewed one Edge Product diesel tuner, and here is another one for you. The Edge Diesel Evolution CTS2 is one of the most sought-after products from the diesel tuners line. That is because the tuner gives you exceptional longevity, performance, and durability.

The Evolution CTS2 is a programmer and in-cabin controller, which is exactly what you need!

You can reprogram the stock computer of your vehicle using the tuner. This device uses just one cable to connect to the OBDII (diagnostic port).

The Evolution CTS2 is not just for diesel vehicles but also gas SUVs and pick-ups. You can save the computer’s stock files and then upload Edge calibrations to your vehicle’s computer.

A team has made the product of experienced engineers to ensure that the functionality is exceptional. You will find the tuner to be a versatile one. With an engine like the 6.7 Cummins, you will need a high-functioning tuner, and you get this from the Evolution CTS2.

The Evolution CTS 2 will give you multiple levels of power. All these power levels are custom-tuned to ensure that you get your desired power level. Depending on your vehicle and driving style, you can choose the power that you feel most comfortable with.

You can enhance the torque and horsepower to a great extent using the Evolution CTS2. It will re-tune your truck and also provide you with real-time data.

You can mount the device inside your vehicle and monitor the data. The tuner shows you the engine data in real-time, which helps you understand its condition. In case of any issues, this constant monitoring will promptly assist you in taking care of the problem.


  • Sleek Design: Easy to mount in the vehicle
  • High-Resolution Display: The screen is easily readable due to the resolution
  • Customizable Background: Great for people who want a stylish display
  • Versatile: Offers multiple features to enhance performance

The Evolution CTS2 is one of the highest-rated tuners that work great for both gas and diesel. That is not where the versatility stops, but it has many more amazing features. From the design to the performance, this tuner is one of the best in the market.

3. Edge Products 84030 Insight Monitor


  • Installation is hassle-free
  • Easy fit for most vehicles
  • Reading is accurate
  • Customer service is very good
  • Very affordable diesel tuner


  • The screen can be very small and unreadable for some users
  • Will not work with an older device

The first three products are from Edge Products for a reason. This company provides high-end tuners that are perfect for 6.7 Cummins. You can enhance the power of the engine safely, which you will not get in most tuners.

The Edge Insight CS2 Monitor is another product from the new Edge tuners line.

You will get all that you need in this compact device. The digital monitor shows you the essential information about the engine vitals. You can see how your engine is performing and whether there are some errors that you need to take care of.

This complete digital device lets you see the necessary parameters in high resolution. Some people might find the screen to be small at 2.4 inches. However, the sleek design is preferred by many drivers since it is easy to plug in and keep.

The Edge Insight CS2 is one of the cheapest products on this list. It is the perfect tuner to choose from should you be on a tight budget. However, you do not have to let go of any essential feature since the tuner has it all.

The tuner has noise alters defined by the user. It also shows the SAE data from the vehicle’s computer. You can view the parameters of the data digitally and in analog mode and change this based on your preference.

One very interesting feature about the device is the diagnostic tool. In this, you can see the codes and also check what type of error is occurring. That helps you better understand what you need to do to take care of the error.


  • High-Resolution Display: Visible readings on the device
  • Sleek Design: Very easy to carry around and place in the vehicle
  • Advanced Scan Tools: Makes it easy to conduct overall data monitoring
  • Diagnostic Tools: Gives you detailed error descriptions

Despite the Edge Insight CS2 being a pocket-friendly mode, it has all the necessary features. Users primarily love the diagnostic tool system that lets you check the details related to any error. Moreover, you can easily install the device in most vehicles.

4. New Superchips Flashpaq F5 In-Cab Tuner


  • The results delivered are accurate
  • Readings of the device are correct
  • Helps in improving mileage
  • Installation is very easy
  • 2-year warranty


  • Lack of Wi-Fi updates
  • Does not have storage space

Not all drivers like a bulky device, and that is why the New Superchips Flashpaq F5 is favored by many. It is a very compact and sleek diesel tuner that is not hard to operate and carry. The installation of the device is also very easy, and you can place it anywhere in the cabin.

The design of the device is not all that is impressive. You will be blown away by the features that this tiny device could pack in it.

The tuner has many advanced tuning options and settings. It is the perfect fit for your 6.7 Cummins diesel engine. Using this diesel tuner will give you an impressive tune on your power, all the while keeping it safe.

The device is so small it will easily fit in your palm.

You can connect the Flashpaq tuner to your truck or car’s diagnostic port. There is an intuitive menu structure using which you can set the tow, performance, or economy tune. The diesel tuner offers you high-performance settings, towing tunes, pulley tunes, fuel economy settings, and much more.

You can see a virtual gauge reader displayed on the screen. Using this reader, you can check the parameters of your engine. That helps you change any settings based on the requirements.


  • Speedometer Recalibration: In case of any issues with the calibration
  • User-friendly Interface: The design of the model and the display is easy to use
  • Compatibility: Very compatible with different models
  • Easy Installation: It does not take up much time to install

You will not be disappointed with this brand new model of the Superchips Flashpaq F5. This device is very small, and you can handle it without any trouble. All you need is to plug the device into your vehicle’s diagnostic port, and you are good to go!

5. Bully Dog 40420


  • The display of the tuner is very user-friendly
  • Safety dueling features eradicate risk by cutting off the fuel
  • Helps in keeping an eye on the engine’s condition
  • Recent engine data displayed on the monitor
  • Four different pre-loaded tunes


  • The display is not a touch-screen
  • The company does not offer smooth technical support

Wouldn’t you like a device that comes with all the necessary setups in its package? This Bully Dog diesel tuner provides you just that!

The device, though compact, is one complete package. You will find a card reader, HDMI cable, power key cable, and micro SD card in the kit. The package also includes an adapter, programmer display monitor, mount, and a DLC cable.

With all the setup necessities present in the package, you will not have to buy anything separately. What more, you can install the whole thing in under an hour!

You can use the Bully Dog to tune the power of your 6.7 Cummins diesel engine. With the Bully Dog, your pick-up truck has enhanced power. The tuner will break the stock settings and operate the engine with the tuned settings.

If you want to go back to the stock setting, you can do so very easily.

The Bully Dog diesel tuner gives you four performance modes. You can choose any one mode depending on your usage. After you select the mode, the tuner will apply this tune to enhance the torque and performance of your engine.

You can save a lot of money by saving fuel which will be beneficial in the long run.


  • Engine Improvement: Tune the engine to a maximum of 250 HP
  • Performance Mode: Offers four types of performance mode
  • Easy Setup: Comes in a complete package that is easy to setup
  • Improved Readability: Offers night and day display for better visuals and readability

One great thing about this diesel tuner is that it is an all-rounder performer. It will be the perfect tuner for your 6.7 Cummins at a very pocket-friendly price. You cannot go wrong with the Bully Dog diesel tuner, not with its ability to move between stock and tuned settings.

Things to Consider When Buying the Best Diesel Tuner for 6.7 Cummins

From the review of the best diesel tuners for 6.7 Cummins, you know about different products. But how do you know which product is the most suitable for you?

Once you know about all the products, it becomes easier to choose. However, to make your choice more concrete, you will need to consider some factors. These factors will ensure that you choose the right diesel tuner for your vehicle.

We have listed some of the crucial factors that you should not ignore while choosing diesel tuners.

Ease to Use and Setup

When you buy a tuner, you need to ensure that it is not very complicated to use. Many tuners come with multiple wires and cords that you need to install. However, not everyone likes to go through a tedious installation process.

If you are the same, you need to look for a very easy tuner to install.

There are many tuners, such as the one from Bully Dog, that you can set up in under an hour. Along with the installation, the tuner should also be easy to use and read.

If you are a beginner, it is better to look for very simple diesel tuners.

Power Levels

A very important thing about a diesel tuner is the power levels it offers. Power levels are the horsepower that the tuner will provide to the engine. Most tuners in the market provide a power level of about 10.

With moderate to good diesel tuners, you can get a power level in the range of 7 to 9. That would majorly depend on the brand that you choose.

It is better to look for brands that provide high power levels. It might cost you more, but the efficiency of these tuners will be exceptional. You can enhance your engine’s horsepower to the maximum.

Monitor Size

You might not give much importance to the monitor size, but it is a very crucial factor. That is because having a very small monitor will show you small fonts.

If the display shows very small fonts, then you will have too much trouble reading it.

The monitor size depends on your comfort level and preference. If you feel that the small monitor is easy to read, you can choose a tuner with a small monitor.

You can also look for small or moderate-sized monitors that have larger fonts. In case you are comfortable using tuners with large monitors, then you can choose one.

Time Frame

One of the crucial factors for ECM tuning systems is the time frame for ECM download. Ideally, it is always preferable the download time is less. That makes the system highly operable and functional.

Most good tuners will have a time frame of about 5 minutes which is very impressive.

Other could take from 6 to 10 minutes which is not a bad thing. However, ensure that the tuner does not take too much time during the ECM download. The data you will be handling also make a difference, so you need to consider that.


When choosing a tuner, versatility means how well the tuner can adjust to the performance capacity. If the adjustment is good, then you can make changes very easily. It also gives you a scope for experimentation without much trouble.

If you follow a different driving style, this would be a great opportunity for you to try new things.

Even though this is not a major consideration, you could treat it as an additional feature. If your tuner provides features that make it versatile, you will have an amazing product at your disposal.


Why do I require a tuner?

If you are buying a tuner for the first time, you may have doubts regarding its need. Many people go for the purchase by listening to others and not from their understanding or requirement.

A tuner will help you enhance the overall functional potential of an engine. It operates through a plug-and-play mechanism and maximizes the torque and horsepower.

There are other functions of a tuner, such as improving the engine’s efficiency and smoothness. That would ensure that your engine functions for a long time and does not die out easily.

If you have a diesel tuner, you can not only enjoy improved power, but you will not waste money on changing engines frequently. That is essential mainly for people who enjoy the thrill of a high-powered drive or have daily on-road vehicles.

Will diesel tuners increase miles per gallon?

Tuners will boost your vehicle’s power and torque. However, most people look forward to the improvement in fuel mileage. So yes, you get an increase in the miles per gallon.

The tuner helps maximize the fuel economy, which increases profit.

The initial saving may not look like much, but you will see a huge difference with proper calculation.

That majorly helps you since the price of fuel is generally on a constant hike. Hence, you can save money and also take out your vehicle without worries.

Do the diesel tuners lower the maintenance cost?

The answer to this is yes. However, it does not directly affect the decrease in the maintenance cost.

When you use a tuner, you can clear and read the diagnostic codes. Hence you can easily find any errors in the engine. If the error gets caught in the beginning stages, you might be able to take care of it yourself.

You will not have to take your vehicle to the dealership, saving a lot of money.

Most people have high maintenance costs since they are unable to catch the errors at an early stage. That will not happen if you are using a tuner for your diesel engine.

Will diesel tuners improve speed and acceleration?

You can enhance the speed and acceleration of your vehicle if you use a programmer. In this case, your Cummins engine may enjoy more than 240 lb. feet torque and 100 horsepower. However, this will be completely dependent on the model you are using.

A programmer will adjust the operating conditions of the engine to enhance the performance.

Programmers are designed to provide you with more power and enhance the functionality of the engine.

You need to ensure that the programmer you are buying is suitable for the engine. In this case, we have listed some of the best diesel tuners that you can use for 6.7L Cummins.

How much horsepower can I add to my engine?

The horsepower will majorly depend on the type of engine you are using. You will get an amazing 400 horsepower from the 6.7L Cummins.

It is recommended not to cross the 120 horsepower level to maintain safety.

If your engine is 6.7 Cummins or any such high-powered engine, then you can add more horsepower to it. However, to do this, you need to ensure that the engine has the right head studs.

You can keep the engine from overheating when it receives too much power. That is crucial since, with extra head studs, you will be compromising on your safety.

How will I know if the diesel tuner fits my vehicle?

The fitting of the diesel tuner is essential. Not all tuners are compatible with all vehicles. Hence, when you buy a diesel tuner, you need to ensure that they are the right fit.

Most of the tuners we have mentioned here are good for most trucks. However, there can still be a certain tuner that might not fit your vehicle.

Before you buy the tuner, make sure you read the description properly. You can specify the make and model of your vehicle to check if the tuner is the right fit for your vehicle.

Never purchase a tuner by assuming the fitting since it can be wrong.


Improving the power of your engine is essential since it increases its longevity. A diesel tuner helps you in this process along with many other benefits. One such benefit is lowering the maintenance cost by displaying the errors quickly.

The diesel tuner is a one-time investment that ensures you do not waste unnecessary money on engine maintenance.

Before you buy your tuner, you need to see if it is the right one for your vehicle and engine. If your vehicle uses a 6.7 Cummins, then you need an equally powerful device and high functioning.

Find the right diesel tuner match for your engine, and you do not have to worry about fuel economy and engine longevity at all!

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