If you own a 6.7 Cummins diesel truck, you want to know: What's the best delete kit for my 6.7 Cummins, and do I need a diesel tuner? The answer is YES.
In this guide, we will show why you must use both a diesel delete kit & tuner for your 6.7 Cummins.
What Is a Delete Kit?
A delete kit is a package that removes or bypasses factory-installed emissions systems. This system includes:
- Diesel Particulate Filter (DPF)
- Exhaust Gas Recirculation (EGR)
- Diesel Exhaust Fluid(DEF)
These systems were made to reduce emissions, but they can also lower fuel efficiency, increase maintenance, and put more stress on the engine. That’s why many diesel truck owners choose diesel delete kits – for more power, less trouble, and a longer-lasting engine.
Read more: What is A Delete Kit? Complete Guide
A full 6.7 Cummins delete kit often includes all these: EGR, DPF, and DEF delete.
What Is a Tuner for 6.7 Cummins?
The diesel tuner is an electronic device that loads custom diesel tuning software into your truck’s ECU (Engine Control Unit). After removing the emission components, like the EGR, DPF, and DEF. It reprograms the truck's ECU. And prevents the truck from entering "limp mode" or triggering error codes.
With the high-performance diesel tuner, like Mini Maxx V2 Tuner, you can do this for your 6.7 Cummins truck:
- 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 Need Both Diesel delete kit and Tuner?
Using both a Delete Kit and a Diesel Tuner together is essential for unlocking the full potential of your 6.7 Cummins. Here’s how it works:
| Scenario | Result |
| Delete Kit Only (No Tuner) | ECU detects missing parts → Check engine lights, limp mode, and performance issues |
| Tuner Only (No Delete Kit) | Gains in power, but emissions components cause blockages and lead to engine issues over time |
| Delete Kit + Diesel Tuner | No faults, maximum power, reduced engine temps, and longer engine life – full performance unlocked |
Delete Kit: Removes the restrictive emissions components (DPF, EGR), allowing your engine to breathe freely and significantly boosting horsepower and torque.
Diesel Tuner: Adjusts your truck’s ECU to function properly without the emissions systems, ensuring the engine runs smoothly and safely, without error codes or limp mode.
Using both together is the only way to unlock your 6.7 Cummins' true performance potential, allowing for trouble-free, high-performance operation.
Benefits of Deleting Your 6.7 Cummins with Both a Delete Kit and Tuner
Here's how each of these upgrades works together to enhance your truck's capabilities:
1. Increased Horsepower and Torque
Delete Kit: By removing the restrictive DPF and EGR systems, your engine can breathe more freely and generate more power.
Tuner: The tuner optimizes fuel delivery and timing, which boosts your engine's overall performance.
Combined Benefit: Together, users experience 100 to 200 HP gains and 200 to 400 lb-ft of torque, making your truck more powerful for towing and daily driving.
2. Improved Fuel Economy
Delete Kit: Removes the need for DPF regeneration cycles, which waste fuel.
Tuner: Fine-tunes the engine for better fuel efficiency, helping you get more miles out of each gallon.
Combined Benefit: Many users see improvements of 3 to 5 MPG, saving you money at the pump over time.
3. Enhanced Engine Reliability
Delete Kit: Reduces the likelihood of common issues like DPF clogging and EGR cooler failures, which can lead to expensive repairs.
Tuner: Ensures the truck’s ECU is properly calibrated, preventing errors and limp mode.
Combined Benefit: With both, your truck will experience lower maintenance costs and a longer engine life.
4. Lower Exhaust Gas Temperatures (EGTs)
Delete Kit: Removes components that can cause excessive heat buildup in the exhaust system.
Tuner: Adjusts engine parameters to help better manage heat and keep temperatures in check.
Combined Benefit: Reduced EGTs lead to improved engine performance and greater longevity.
Considerations Before Installing
While the benefits are clear, it’s important to consider the following points before moving forward with installing a Delete Kit and Tuner:
Legal Implications: In many regions, including states like California, removing emissions systems can be illegal for on-road vehicles. Always ensure you understand the regulations in your area before proceeding.
Warranty Concerns: Modifying your vehicle may void its warranty. Consult your dealership to understand how these modifications may affect your truck’s warranty.
Installation Expertise: Proper installation is crucial to avoid issues and ensure maximum performance. Consider seeking professional help to ensure that the delete kit and tuner are properly installed.
Conclusion
Upgrading your 6.7 Cummins with both a Delete Kit and a Performance Tuner is one of the most effective ways to boost your truck’s performance, fuel efficiency, and overall reliability.
At SPETUNER, we provide high-quality all-in-one delete kits and tuners. Ready to take your 6.7 Cummins to the next level? Explore our products today and experience the difference.
