If you’re driving a 6.7 Cummins diesel truck, you’ve likely wondered: what is the best delete kit for 6.7 Cummins? And do you also need a diesel tuner? The short answer: yes — and here’s exactly why.
In this guide, we’ll break down the differences between delete kits and diesel tuners, show how they work together, and explain why using both is the only way to fully unlock your engine’s potential—especially when you choose a trusted solution like RaceMe.
What Is a Delete Kit?
A delete kit is a package of parts used to remove emissions control systems from your diesel engine. These systems include:
- DPF (Diesel Particulate Filter)
- EGR (Exhaust Gas Recirculation)
- DEF (Diesel Exhaust Fluid)
A complete Cummins delete kit often includes a DPF delete pipe, EGR delete kit 6.7 Cummins, and DEF delete kit components.
These systems were designed to reduce emissions—but at the cost of reduced fuel economy, added maintenance, and engine strain. That’s why so many diesel truck owners turn to diesel delete kits for more power, less hassle, and longer engine life.
What Is a Diesel Tuner?
A diesel tuner is a device that loads custom diesel tuning software into your truck’s ECU (Engine Control Unit). With the right tuner — like the RaceMe Ultra — you can:
- Disable emissions systems (EGR, DPF, DEF)
- Prevent limp mode or warning lights
- Optimize performance with tuning levels
- Boost torque and horsepower
- Improve throttle response and fuel efficiency
And here’s the critical part: if you remove emissions parts without adjusting the ECU, your truck will detect missing sensors and throw error codes. That’s why a delete kit without a diesel tuner simply doesn’t work.
Why You Must Use Both: Delete Kit + Diesel Tuner
Using both tools together is the only way to properly delete a modern diesel truck like the 6.7 Cummins. Here’s how it breaks down:
| Scenario | Result |
| Delete kit only, no tuner | ECU detects missing parts → check engine lights, limp mode |
| Tuner only, no delete kit | Performance gains, but emissions parts clog and cause issues
|
| Delete kit + diesel tuner | No faults, more power, lower temps, longer engine life |
A full delete kit physically removes the emissions restrictions. A diesel tuner tells your truck’s computer how to run without them. Only together do they give you trouble-free, high-performance operation.
What’s in the Best Diesel Delete Kit?
The best diesel delete kit for 6.7 Cummins should include all core components for emissions removal and ECU tuning:
- DPF delete kit: Replaces the diesel particulate filter with a straight pipe
- EGR delete kit 6.7 Cummins: Removes the EGR valve, cooler, and block-off plates
- DEF delete kit: Disables the DEF injection and sensors
- Diesel tuning software: Typically preloaded into a tuner like RaceMe Ultra
The advantage of choosing RaceMe? You get hardware and software in one package, tested for compatibility and built for serious diesel performance.
Benefits of Deleting Your 6.7 Cummins (with a Tuner)
When you use both a delete kit and diesel tuning software, the benefits are immediate and significant:
- Up to 20% better MPG
- +100 to +150 HP gains
- Lower exhaust gas temps (EGTs)
- No more DPF regens or DEF fills
- Longer-lasting engine with less soot and buildup
- Better throttle response and smoother driving
If you tow, daily drive, or just want peace of mind from constant emissions problems, this is a game-changer.
EXPLORE: Towing Heavy Loads: Why RaceME Ultra Is a Must for RV and Boat Owners?
Why Choose RaceMe?
RaceMe is trusted by thousands of 6.7 Cummins owners because:
- Supports all 6.7L models from 2007.5–2024
- Works with all major delete kits and hardware
- Includes preloaded tuning levels for every driving style
- Easy to install (no bench flashing or complicated setup)
- Comes with regular updates and responsive support
Whether you’re a first-timer or a seasoned diesel tech, RaceMe gives you the best diesel delete kit solution in one smart package.
