Pros and Cons of a 6.7 Cummins Delete

When you remove emissions control systems like the DPF and EGR, your engine breathes easier — resulting in more horsepower and torque. You could see up to 100 horsepower in gains. For truck owners who enjoy towing heavy loads or just want that extra kick, this power increase can make a world of difference day to day.

With fewer systems weighing the engine down, your truck doesn't need to work as hard to run efficiently. For long-distance drivers or those who use their trucks for work, those extra miles per gallon add up. On top of that, you won't need to spend on diesel exhaust fluid (DEF) anymore.

Clogged filters, faulty sensors, and system malfunctions are all too common and expensive to fix. By deleting these systems, you eliminate these problem points entirely. If your truck sees heavy-duty use — towing, off-roading, or frequent long drives — deleting can significantly reduce wear and tear on your engine.

One downside of removing these emissions systems is the increase in pollutants, particularly nitrogen oxides (NOx). These emissions contribute to smog and other environmental issues. However, if you live in an area without stringent emissions tests, this may not be a pressing concern for you.

Deleting your engine might not be legal everywhere. In certain states like California, emissions regulations are strict and removing these systems could result in hefty fines. Additionally, deleting your engine can void your vehicle's warranty, leaving you on your own if something goes wrong.

Without the emissions controls, the exhaust may run hotter. However, with proper tuning and care, this can usually be managed without issue — and it's something most drivers find worth dealing with in exchange for the performance benefits.