If you own a 6.7L Cummins engine—especially in a Ram 2500 or 3500—you’ve probably heard about delete kits. These kits are popular among diesel enthusiasts looking to increase power, improve fuel economy, and eliminate long-term emissions system headaches. But with so many options on the market, the big question is: What is the best delete kit for a 6.7 Cummins?
Let’s break it down.
A Quick Legal Note
Before diving in, it’s important to mention that removing emissions components like the DPF, EGR, or SCR is illegal for on-road vehicles in many areas, including the U.S. and copyright. Delete kits are intended for off-road or competition use only. Using them on public roads can lead to fines or violations of emissions regulations.
Always check your local laws before considering a delete kit.
What Does a Delete Kit Do?
A delete kit removes or disables emissions-related components like:
DPF (Diesel Particulate Filter)
EGR (Exhaust Gas Recirculation)
DEF/SCR (Diesel Exhaust Fluid/Selective Catalytic Reduction)
Benefits often include:
Increased horsepower and torque
Improved fuel mileage
Lower exhaust temps
Elimination of regen cycles
Less soot buildup and reduced maintenance
Best Delete Kits for 6.7 Cummins (Top Picks)
Here are some of the most recommended delete kits by diesel enthusiasts and performance shops:
1. MM3 Tuner with Custom Tunes
What it does: Acts as the “brains” of the delete process, disabling DPF, EGR, and SCR in the ECU.
Why it's great: Very customizable with on-the-fly tuning and support for multiple power levels.
Paired with: EGR delete kit + DPF delete pipe.
Best for: Tuners who want full control and flexibility.
2. RaceME Ultra Tuner
What it does: All-in-one tuner for 6.7 Cummins (2007.5–2021) that supports full deletes.
Why it's great: Plug-and-play with preloaded tunes and gauges, no need for custom tuning.
Includes: DPF, EGR, and DEF delete support.
Best for: Users who want simplicity and minimal setup time.
3. EFI Live with CSP5 Switch
What it does: Offers custom tuning and switchable power levels.
Why it's great: Allows custom delete tunes and power level changes on the fly.
Requires: Delete pipe, EGR block-off plates, and tuning from a reputable tuner.
Best for: Advanced users who want tailored tuning.
4. Flo~Pro DPF Delete Pipe
What it does: Replaces the factory exhaust system and removes the DPF/SCR.
Why it's great: Stainless steel construction and bolt-on fit.
Pair with: MM3 or RaceME Ultra for full functionality.
Best for: Reliable performance and exhaust tone.
5. Pusher EGR Delete Kit
What it does: Removes the EGR system to reduce soot buildup and lower intake temps.
Why it's great: Clean install, high-quality machining, great airflow improvement.
Best for: Anyone doing performance mods or wanting long-term reliability.
What’s the Best Setup?
For a solid, reliable delete setup on a 6.7 Cummins, many owners recommend:
RaceME Ultra Tuner + Flo~Pro DPF Delete Pipe + Pusher EGR Delete Kit
It’s a proven combo that covers tuning, exhaust, and EGR in one package.
Final Thoughts
Choosing the best delete kit for your 6.7 Cummins depends on your goals, budget, and technical experience. Whether you're chasing horsepower or just tired of regen cycles and CELs, a properly selected delete kit can totally transform your truck’s performance. Just make sure you’re using it legally and responsibly.