6.7 Cummins Delete Kit Review In 2023 [EGR, DPF & SCR Delete Details]

We know that there’s a lot of controversy about getting a 6.7 Cummins Delete Kit. But that won’t stop those who want to get rid of their restrictive systems.

Are you one of those brave ones? Then you’re in the right place.

To save you countless hours from looking at many wrong places, we scoured the Internet to find the perfect delete kits.

And if you’re still not sure about deleting the emission system, then we’ve got plenty of reasons that will change your mind for good.


What it Means to Delete Your Emission System

The term deleting your emission system can be pretty confusing for newcomers.

However, deleting the emission system means getting rid of the government-mandated emissions control devices.

If you don’t know what that is, it’s just a system that ensures toxic air pollutants won’t be released into the environment.

Back in the day, the government realized that some pollutants could be pretty harmful to the environment.

As a result, the emission system became mandatory. Unfortunately, this system does more harm than good for those who love high-performance vehicles.

As you would expect, removing the system requires additional retuning of your car’s engine to exclude the emission systems and to program the engine for optimal performance.

This is not a beginner-friendly job and can’t be difficult if you don’t know what you’re doing.

Failing to do so can lead to engine failure. You cannot pull out a few parts and expect the vehicle to work. Additional service must be done.

Can I Delete My Emission System Without Getting in Trouble?

It’s time to go to work, but your 6.7 Cummins makes it pretty hard.

At this point, getting a 6.7 Cummins EGR delete kit sounds like a great idea, but if you’ve done some research, you’ve probably noticed that it’s illegal.

And you’re not wrong — it is illegal, and you could get in trouble, and if your state does emission testing, you’re not going to pass. And you could end up with a $2,500 fine.

But here’s the thing, your country might have different laws. For instance, you can still pass the safety test if you’re in Canada, even if you delete the emission system.

Getting delete kits is relatively easy in Canada. You can probably walk into a store and find one right away.

But things can get quite tricky if you live in the United States.

But let’s keep it a buck fifty. Most people still do it even if it’s illegal.

You probably have a friend that boasts about how smoothly their truck runs after deleting the emission system and what you’re missing out on.

But in reality, enforcement is rare — unless you’re a big corporation.

In other words, do this at your own risk.

You can also check the review of best exhaust for 5.9 cummins

EGR DPF & SCR Delete Explained

Not sure what each emission system does? Here’s a short explanation for the emission system:

EGR Delete

Your truck comes with many valuable features to stop harmful components from being released into the environment.

That doesn’t sound like a bad thing, right? Well, many truck owners would like to have a word with you.

One of these components is the exhaust gas recirculation or EGR for short.

This system is pretty restrictive and decreases your engine’s performance. For that reason, many drivers hate this component and often get rid of it.

By getting rid of this part of your vehicle, you will significantly increase your performance and fuel economy.

DPF Delete

The diesel particulate filter, another of your vehicle that had great intentions from the get-go, but ended up being a disaster.

If you’re not sure what that is, it’s a device that removes impure carbon particles from the exhaust of your engine.

Back in 2008, it became mandatory for diesel engines to address the DPM problem, which is just partially burned diesel fuel.

Think of a truck with a long tailpipe releasing contaminants into the environment.

Unfortunately, this device decreases fuel economy and performance.

For instance, your gas mileage can drop to a whopping 30%. And to make things even worse, it requires a lot of maintenance.

If the DPF clogs up, you’re pretty much out of luck. It’s not like you can pull it out and clean it.

You’ll have to replace the engine itself to get it back on the road. For that reason, drivers get rid of the DPF.

SCR Delete

Another part of your vehicle designed to reduce emissions is the selective catalytic reduction or SCR for short.

Like the EGR and DPF, there’s nothing wrong with the idea behind these systems.

However, SCR failure can be pretty expensive, to say the least. To avoid costly repairs, drivers delete the SCR.

Besides that, deleting the SCR will improve your engine’s health. And finally, getting rid of the SCR can also increase your fuel economy and engine efficiency.

Need more information about all these systems? Then here’s a simple video that simplifies the emission systems:

Should I Delete My Diesel? The Truth about Diesel Emissions ?

Why You Should Delete Your Emission System 6.7 Cummins

For most people, the mere thought of installing a 6.7 Cummins delete kit can be terrifying.

But you’d be surprised by how much it can improve your vehicle’s performance.

Still not convinced? Here are a couple of reasons why you should remove the emission system:

Extends Your Engine’s Lifespan

This is no surprise to anybody, but your engine produces enough power to take you to all the places you need to go.

So, we probably don’t need to tell you why you’d want to increase your engine’s life expectancy.

By removing the emission system, you would essentially increase your engine’s life by a whopping 50 – 100%, which is a huge deal.

Make More Horsepower

Modern vehicles are pretty fast right off the box, but that doesn’t mean you should take that for granted.

For instance, one of the main benefits of getting rid of the emission system is the massive increase in power. Removing the DPF would increase your performance by 5 – 10%.

For that reason, emission delete kits have become pretty common to drivers who want to increase their horsepower.

Better Mileage

Drivers are always trying to find ways to increase fuel economy, and while some methods are better than others, one efficient method would be to get rid of the emission system.

4 Things You Should Know Before Deleting the Emission System

We’ve talked about benefits and how you could get in trouble if your state does emission testing.

But let’s talk about all those negative things you should know before installing a 6.7 Cummins full delete kit.


This goes without saying, but you’ll ruin your car’s warranty if you delete the emission. Yes, the dealer will know.

They have plenty of tools to verify that you modified the vehicle. It does not take much time, and they’ll call you out on it.


This is a little bit of a controversial topic, but if you hate certain noises, you’ll hate removing the emission system.

Certain people respond with stress and irritation to noises.

So, deleting the emission system doesn’t sound like a great idea if you hate loud noises.

But if you don’t mind the excessive noise, you’ll most likely fall in love with your vehicle.


You know what they say: everything comes with a price. So, you have to decide if the consequences of action are worth the risk and money you have to spend to delete your emission system.

It costs a ridiculously amount of time to remove the EGR, DPF, and SCR. And to make things worse, this is illegal and can result in high penalties.

It’s Getting Hard

As much as we love deleting the emission system, it’s just getting too hard for the average Joe.

Countless companies in the USA are going out of business, making it hard for most people to get their hands on a delete kit.

Regulations are skyrocketing, and you could get a massive bill for deleting the system.

States like California and New York are pretty restrictive when it comes to emission systems. So, it’s not worth the trouble if you’re in one of those states.

And unless you know what you’re doing, you won’t be able to pull it off on your own. It takes a lot of time and effort.

Want to know more about this topic? Then here’s a well-made video that covers this:

How to Delete the EGR, DPF and SCR Emission Systems

Here’s a short but helpful guide to remove the EGR, DPF, and SCR:

How to Delete the EGR

To delete the EGR, remove the EGR valve and then cap it off. After that, remove the related EGR tubing and then proceed to cap it off on the exhaust manifold.

Next up, reprogram your engine. Otherwise, the engine will go into limp mode.

How to Delete the DPF

To delete the DPF, you have to remove the unit from the vehicle and then cap the electrical connectors.

Once that’s done, install a straight pipe. Finally, you must reprogram the engine’s computer.

How to Delete the SCR

To delete the SCR, remove the unit itself and the injector. From there, cap off the electrical wires and then install a straight exhaust pipe.

Like the EGR and DPF, you have to flash the engine’s computer. Otherwise, the vehicle will throw up some codes.

3 Best Cummins Delete Kits Reviews in 2021

We love high-performance, but the 6.7 Cummins engine can only do so much. So, here are the best delete kits available for this engine:

01. LAPAZ LAPAZE002 Cummins 6.7L – Best Overall


Highlighted Features

  • Gas improvement
  • Engine lifespan increase
  • Coolant flow enhancement
  • Performance boost

Looking for the best 6.7 Cummins delete kit but can’t find one that suits your needs? Well, this kit from LAPAZ is what you need.

One of the main benefits this model offers is that it improves your gas mileage, meaning you won’t have to go easy on the pedal or drive slowly.

Moreover, the installation process is not as hard you might think. This company includes everything you need so you won’t take trips to the hardware store.

Besides, they’ve made it so your engine would last longer. This is possible thanks to the coolant valve, as the engine will have a much easier time cooling down.

“A little bit disappointing that they did not include instructions. It would’ve made it so much easier for DIYers. Still, you’re getting a high-quality coolant valve kit for a reasonable price.”

What We Liked

  • Protects the engine
  • Improves gas mileage
  • Easy to install
  • Perfect performance upgrade

What We Didn’t Like

  • Does not include instructions

02. KMT KMT-OT00359A Valve Kit – Best for Performance


Highlighted Features

  • Fuel economy boost
  • Smooth operation
  • Engine-temperature decrease
  • Toxic contaminants reduction

Looking for a valve kit to finish your 6.7 Cummins delete? Well, then let this fantastic kit from KMT help you finish off this job.

The most attractive thing about this kit is that it includes a silicone radiator hose, making it perfect for those who want to get rid of their old stock rubber radiator hoses.

Better yet, the silicone radiator hose this kit includes is perfect for carrying hot liquids without getting destroyed in the process like most rubber hoses.

Besides that, consumers have expressed that their diesel engines run way better after installing the EGR delete kit.

And finally, this valve kit removes the risk of engine damage caused by the EGR system. Overall, you can’t go wrong with it.

 “As much as we love this kit, we’ve noticed that this brand does not include instructions. Sure, this might not be a dealbreaker if you know what you’re doing. But if you don’t, it can be annoying to look it up on your own.”

What We Liked

  • Improves performance
  • Engine runs cleaner
  • Stops harmful contaminants
  • Increases fuel economy

What We Didn’t Like

  • Does not include instructions

03. Fleece Performance Engineering FPE-CLNTBYPS-CUMMINS-6.7 Coolant Bypass – Best for Cooling Down Engine


Highlighted Features

  • High-temperature decrease
  • Performance boost
  • Towing improvement
  • Rear-freeze plug relief

Fleece performance engineering, an American company, is best known for supplying high-performance aftermarket parts for your vehicle.

And this time, they’ve got a mind-blowing coolant bypass valve kit.

If anything, consumers have expressed that their thermostat opens up at 180 F after that installation. That way, the coolant bypass valve will accelerate the engine warm-up.

In addition, there’s another part we love about this product — it keeps the engine healthy.

Sure, this is an expensive kit, but it’ll cool down your engine when doing down the road. So, you’ll only have to focus on the road.

The assembly process is quite simple. You do need to know what you’re doing. But other than that, this job is pretty straightforward.

“Be careful when installing this kit. Some consumers have reported that they failed to inspect the O-rings, and the unit started leaking after installing.”

What We Liked

  • Easy to install
  • Cools down the engine
  • Opens up at 180
  • Improves gas mileage

What We Didn’t Like

  • The unit could leak

Frequently Asked Questions (FAQs)

To learn more about emission systems and how you could benefit from getting rid of them, check this out:

Has anyone been fined for DPF Delete?

You could delete the emission system and spend years without getting in trouble.

But if they catch you without it, you could be fined. As long as you stay away from places like California, you should be fine.

Is it illegal to sell a car with no DPF?

Yes, it is illegal to sell a car with no DPF. The buyer could take legal actions against you if they found out. For more information about this, please check your local laws.

Is deleting a diesel good?

Deleting your diesel will increase your gas mileage and performance. There are plenty of kits available for this job.

However, know that this is illegal and could get you in trouble. Run it at your own risk.

Does EGR delete damage engine?

No, getting rid of the EGR won’t damage your engine. If anything, it will improve your gas mileage and stop harmful components from getting inside the engine.


Before installing a 6.7 Cummins delete kit, please check your federal and local laws. As we explained before, you won’t pass the emission test if you get caught.

Once you’ve got rid of all those things robbing you of your dear performance, you won’t look back. It is expensive upfront, but it’s worth every penny.

Luckily, there are several YouTube videos for deleting the emission system, but if you don’t feel comfortable, leave it up to a certified professional.

georgelawsongallery.com is a participant of the Amazon Affiliate program. We may earn a small commission if you purchase through our recommended links. More details.

Leave a Comment