4 Best Diesel Tuners for 6.7 Cummins – Ranked & Reviewed

best tuner for 6.7 cummins

The 6.7L Cummins engine is the thing legends are made of. From the factory, it produces some exceptional torque and horsepower numbers, however, with the right diesel tuner, this engine will do some amazing things. For this reason, we’ve compiled this list to help you find the best diesel tuner for 6.7 Cummins.

4 Best Diesel Tuners for 6.7 Cummins:

RankPictureProductBrandProduct Dimensions
#1H&S Performance Mini MaxxH&S Performance Mini Maxx TunerH&S9.1 x 8.1 x 4.4 inches
#2Edge Products 31105 JuiceEdge Products 31105 Juice with Attitude CTSEdge Products17 x 9.8 x 4 inches
#3Bully DogBully Dog 40420 GT Platinum Tuner for Diesel ApplicationsBully Dog12.5 x 4 x 12.5 inches
#4RaceME ULTRA DPFRaceME ULTRA DPF Delete ProgrammerRaceme9 x 4.1 x 4 inches

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#1 – H&S Performance Mini Maxx Tuner – Best Diesel Tuner for 6.7 Cummins

H&S Performance Mini Maxx Tuner

Our best tuner for 6.7 Cummins engines is manufactured by none other than H&S Performance. H&S was created out of a need for getting greater performance out of diesel and racing engines. They were the first to ever design a DPF Delete exhaust system for the 2007.5+ Dodge Ram 6.7L. For late model Dodge Cummins, GM Duramax, and Ford Powerstrokes, H&S has proven to be a leader in performance tuning and exhaust systems.

Through hours upon hours of research, H&S delivers the highest quality parts and services designed with customers like you in mind. If you want to step up your diesel engine’s performance to the next level, you need an H&S Performance product.

This tuner may well be the most widely used in North America – and for good reason. This tuner has been shown to produce up to 250 extra horsepower in both stock and emissions deleted trucks. It offers tons of parameters for you to maximize your engine’s performance to levels that you prefer, adding a customization aspect to this tuner that you are sure to love.

Additionally, the two inch monitor on this system lets you keep track of your engine’s inputs and outputs. This helps you to protect your truck from anything you might find alarming on your readouts. It’s also a touchscreen that enables you to switch in and out of different performance modes on the fly.

With this feature, you can adjust for the best MPG possible or maximum torque for effective towing. The box the tuner comes in contains everything you need to install this unit. You’ll find the monitor, any necessary wiring, and an instruction manual with detailed step-by-step notes to make installation a breeze. This awesome tuning option is compatible with any GM truck from 2008 to 2014 so it will definitely fit your 6.7 Cummins and increase your performance in an immediately noticeable way.

According to reviews, this tuner is exactly what you would be looking for out of the best tuner for 6.7 Cummins engines. An impressive 82% of users have rated this tuner with five stars on Amazon, pointing to widespread satisfaction in the market. Reviewers commonly note several things about this tuner that make it their favorite option for their Cummins.

H&S Performance

Most note the immediate improvement in gas mileage that they see. Some say they see as much as a five mile per gallon improvement after installing their tuner, adding as much as 75 miles to the average range of a gas tank. People also like the usability of the product, all the way from installation to day to day use.

Many find that the installation process is simple, both in terms of hardware and software. The physical installation is simple enough for the average truck user because the power supply for the tuner wires right into the fuse box. Downloading and installing the program produced no issues, as well.

This is something that is very valuable to us because we know that computer code isn’t usually a truck lover’s strong suit. All told, this tuner is a top notch product that is sure to impress you the second you start driving your truck with it installed. The combination of superior H&S engineering, ease of use, and downright effectiveness makes the H&S Performance Mini Maxx Tuner the best tuner for 6.7 Cummins equipped vehicles.

#2 – Edge Products 31105 Juice with Attitude CTS

Edge Products 31105

Edge Products is an industry leader that has produced a high quality option for tuning your 6.7 Cummins. Since 1999, Edge Products has carved itself out a place above the rest as innovator in the diesel truck tuning game. Over time, though, Edge began creating products for gas cars, trucks, and Jeeps, proving a formidable competitor in those markets, too. All of Edge Products’ aftermarket, performance enhancing electronics have proven to be game changers due to Edge Products’ outstanding engineering.

According to Edge Products what makes them stand out is the unrivaled user control and style in all of their products. They produce modules, programmers, and monitors under several different brand names that can be equipped to nearly all major car manufacturers.

In February 2011, Edge chose to be a part of the MSD Performance Family, specifically joining Edge Products and Superchips (a competitor) into the new entity “Powerteq” with both continuing to operate under their own respective brands. Edge continues to make high quality tuners that perform at or near the top of the market, including their 31105 Juice tuner, possibly the best tuner for 6.7 Cummins engines available.

This tuner is unique – and powerful – in a variety of ways. This unit receives the signals from your truck’s onboard computer and monitors those indicators, constantly looking for ways to improve performance. It can capture and show numerous engine readings that you would never have the opportunity to look at on stock gauges like exhaust temperature, turbo boost, and engine temperature.

The ability to monitor this information can mean the difference between maintaining a healthy engine and unknowingly driving around with serious problems. Using the 4.3 inch color touch screen, you can switch between multiple power levels, on the fly, with the tap of a finger. But the extra features on this product do much more than get you improved gas mileage or torque.

The scan tool allows the unit to read and clear troublesome codes within your truck’s computer, meaning your engine will be getting better information and commands and, in turn, improved performance. Additionally, the maintenance manager programmed into the software of this product lets you set up mileage based alerts to get maintenance done on your truck.

Edge Products 31105

With this feature, you will be able to make sure that you keep your vehicle in top condition. This capability alone could pay for the unit’s sticker price by letting you do preventative maintenance when it is needed. Accordingly, the engine boosting abilities and added features of this tuner land it high up on our list for the best tuner for 6.7 Cummins Ram models.

Looking to reviews of this tuner, it appears that the Edge Products 31105 Juice with Attitude CTS is a serious contender. This particular model is rated at a striking 4.8 out of 5 on Amazon with comments speaking to some serious added value to customers’ trucks. Consumers say that this product is really easy to install as long as this is indeed the right model for your truck.

Additionally, people write that their engine instantly performs like they bought a brand new truck with an entirely different engine in it. Users cite better accelerations, fuel efficiencies, and towing torque as evidence of their improved performance levels. All told, this tuner definitely belongs near the top of any list for the best tuner for 6.7 Cummins engines.

#3 – Bully Dog 40420 GT Platinum Tuner for Diesel Applications

Bully Dog 40420

Stationed in American Falls, Idaho, Bully Dog set out focused on improving diesel engine performance – and succeeded. Their high quality tuners are built to stay on the cutting edge of technology by utilizing advances in mobile computing, cloud computing, performance monitoring, and Wi-Fi & Bluetooth technologies.

Bully Dog’s ECU calibration technologies help those who want to add performance to their vehicles through the beauty (and ease) of computer code. Their tuners have come to be known as top of the line and loved by customers all over the world, making the Bully Dog 40420 GT Platinum Tuner quite possibly the best tuner for 6.7 Cummins engines.

This tuner comes preloaded with tunes that add immediate power, torque, and increase fuel economy. Case closed, right? Well, as they say: But wait, there’s more. The monitor that comes with this tuner gives you opportunities beyond using simple preset tunes and wistfully driving along. The display can show you vehicle data that is critical to both understanding the performance of your engine as well as monitoring any possible issues that your truck could be having.

The monitor also lets you switch power options on the fly, making it so you can go from towing to climbing to cruising, all with the best performance possible, with the few taps of a finger. Additionally, this tuner allows you to set custom tunes by visiting SCT Custom Tuning Dealers near you, adding greater value to this unit. Looking at the whole package, this Bully Dog product is exactly what you need for getting the best out of your 6.7 Cummins.

Bully Dog GT Platinum Tuner

Reviews of this product actually show a bit of mixed emotion. More than half of reviewers say that this is the best product they could imagine and will take it to the grave. They say that it is everything that they could have wanted out of the best tuner for 6.7 Cummins vehicles and love the increased engine performance that the unit gave them.

However, many poor reviews talk about issues with the software in this product. Some say that the software simply wasn’t compatible with their truck or that updating their unit caused major problems. Still others say that the product fit their truck just fine but, unfortunately, never showed any improvement in performance. So, customers are somewhat split about this product. Fortunately, you are the only one that can decide if this product is right for you and get your hands on Bully Dog’s tuner for yourself.

#4 – RaceME ULTRA DPF Delete Programmer


RaceME is a Canadian company that creates racing tuners for Cummins equipped RAM trucks. These tuners have come to be known for their prowess in getting far better performance out of Cummins engines, making them a competitor in the race to be the best tuner for 6.7 Cummins users. This particular tuner provides all of the features available on this list from other products in one – plus more.

This tuner programs into your truck in, at most, seven minutes. This could save you hours off of your installation time all by itself. Once installed, this product uses a 4.3 inch display to show you tons of information about your vehicle with the ability to modify your performance on the fly. The tuner provides 10 different stages of tuning that can provide up to 200 more horsepower to your vehicle.

Using the touchscreen, you can make on the fly adjustments to these stages. You can even change fuel duration, rail pressure, timing, and torque, among other options. Additionally, this product has the capability of saving tons of information about the performance of your vehicle so that you can look back at your race information.

The software for this product is also top of the line. The updates are downloaded onto MicroSD cards that are inserted into the unit for easy installation. The tuner reads and clears troublesome diagnostic codes, keeping your engine running fresh. Altogether, these features give you a great value of out this tuner.


Reviewers of this product all say that this tuner unleashed the beast within their Cummins engine. Everyone mentions how this tuner provides a ton of options for customizing your engine’s tuning to your exact specifications. However, customers took this two different ways. Most enjoyed getting to fiddle with their engine until it was to their exact desired characteristics.

But, others found all of the tuning options to be cumbersome and confusing. They also felt that getting a hold of someone at RaceME’s tech support to help them out with their turning was difficult. All told, it looks like this tuner is the best tuner for 6.7 Cummins engines if you are looking for a lot of customizing options. If not, you may want to look elsewhere.


The right tuner for your Ram 2500 or 3500 is an essential component of every attempt to get more power out of your truck. Especially is you’ve installed a leveling kit or lift kit with larger tires, or you tow, a tuner will help you keep that truck feeling nimble and fast.

Images: AlphaCoders, Amazon