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Ultimate Guide: Deleting EGR on 6.7 Cummins Engine

Are you seeking to enhance the performance of your 6.7 Cummins engine? Deleting the Exhaust Gas Recirculation (EGR) system might be the solution you're looking for. In this comprehensive guide, we'll walk you through the process of deleting EGR on your 6.7 Cummins engine, addressing legal implications and performance improvements along the way.

Let's dive in and unlock the full potential of your Cummins diesel powerhouse.

1. What is an EGR Deletion Kit?

Definition of EGR Delete Kit

An EGR Delete Kit (EGR) is a retrofit component designed to improve engine performance.EGR, or Exhaust Gas Recirculation, is designed to reduce NOx emissions, but it can also lead to a decrease in engine efficiency and an increase in carbon buildup. By using an EGR delete kit, vehicle owners can completely shut down the EGR system, thereby improving engine efficiency and power.

In this article, we'll take an in-depth look at how to delete a 6.7 Cummins EGR and the pros and cons associated with it. If you're also interested in EGR delete kits for other models, such as the 6.0 Powerstroke EGR delete kit and the Duramax EGR delete kit, read on and we'll provide you with comprehensive guidance and information.

Components of an EGR Deletion Kit

A complete EGR delete kit typically includes the following components:

  • Closure plate
  • pipework
  • Cooler bypass
  • Necessary fasteners

SPELAB's EGR delete kits are of exceptional quality and design to ensure you get the best results when carrying out your conversion. We cover a wide range of models, from 6.7 Cummins to 6.0 Powerstroke and Duramax.

EGR delete kits from SPELAB

SPELAB was established in 2019 and is dedicated to manufacturing high performance automotive parts. Our EGR delete kits are not only competitively priced but also of superior quality. We have an extensive customer base in North America, South America, Asia, the Middle East, and Europe, and have warehouses in Kentucky, California, and New Jersey to ensure fast delivery.

By choosing an EGR delete kit from SPELAB, you will experience significant performance gains and longer engine life. Visit our product page today to learn more about the 6.7 Cummins EGR Delete Kit and other models.


2. Why delete EGR?

2.1 Advantages of deleting EGR

Improved engine performance

Deleting the EGR system can significantly improve engine performance. As the EGR system recirculates some of the exhaust gases back into the intake manifold, this can lead to higher intake air temperatures and affect combustion efficiency. By installing an EGR Delete Kit, such as the 6.7 Cummins EGR Delete Kit, you can completely switch off the EGR system, allowing the engine to receive cooler intake air, improving combustion efficiency and power output.

Improved Fuel Economy

The engine's fuel economy also improves when an EGR delete kit is installed. Without the interference of the EGR system, the combustion process is more efficient and fuel utilisation is better. Both the 6.0 Powerstroke and Duramax EGR Delete Kits help car owners reduce fuel consumption and save money on gas.

Reduces carbon build-up

EGR systems are prone to causing large amounts of carbon build-up in the intake manifold and valves, which can affect engine performance and longevity. By installing a 6.7 Cummins EGR delete kit, you can reduce this carbon build-up and keep the engine's interior clean, thereby extending the engine's life.

2.2 Disadvantages of EGR Deletion

Legal Issues

While there are many benefits to deleting your EGR system, in some areas, this modification is illegal. Many state and national environmental regulations prohibit deleting an EGR system because it increases NOx emissions. Therefore, it's important to be aware of local laws and regulations to ensure compliance before making a modification.

Environmental Concerns

EGR systems were originally designed to reduce harmful emissions, especially NOx. After deleting the EGR system, these emissions may increase and adversely affect the environment. Therefore, vehicle owners need to weigh the pros and cons and consider environmental factors when deciding to delete the EGR system.

2.3 Effects of EGR Deletion on 6.7 Cummins

For 6.7 Cummins engines, the effects of deleting the EGR system are particularly significant. After installing a 6.7 Cummins EGR delete kit, owners will immediately experience increased power output and improved fuel efficiency. Additionally, the reduced carbon buildup will help extend the life of the engine and reduce maintenance costs.

By understanding the pros and cons of deleting the EGR, owners can make a better decision on whether or not to go ahead with this modification. Next, we'll detail how to delete the EGR in your 6.7 Cummins to help make the process a smooth one. Click on the next page now for detailed EGR deletion steps and considerations.

3. How do I remove the EGR from my 6.7 Cummins?

3.1 Preparation

Before you start to remove 6.7 Cummins EGR, make sure you have all the necessary tools and equipment. Here are the basic tools you need to have on hand:

  • Spanner and socket set
  • Screwdriver
  • Protective gloves and goggles
  • Padded cloth or cardboard (for protection from oil and grease)

It is also necessary to purchase a high-quality 6.7 Cummins EGR delete kit, such as those from SPELAB. Our EGR delete kits contain all the necessary components and are precision engineered to ensure a perfect fit for your engine.

3.2 Removing the factory EGR kit

Step 1: Disconnect the battery

Firstly, disconnect the vehicle's battery for safety reasons. This will prevent any electrical malfunctions or short circuits from occurring during operation.

Step 2: Remove the Intake Manifold

Next, remove the intake manifold. You'll need to carefully handle all of the lines and sensors connected to the intake manifold. Use a spanner and socket set to loosen all relevant bolts and then gently remove the intake manifold.

Step 3: Remove the EGR Valve and Cooler

Then, remove the 6.7 cummins valve cover and cooler. Depending on your 6.7 Cummins engine model, it may be necessary to remove multiple components to fully remove the EGR valve and cooler. Be sure to save all bolts and small parts properly for subsequent installations.

3.3 Installing the SPELAB EGR Delete Kit

Step 1: Install the new EGR module

Firstly, fit the new EGR module from the SPELAB EGR delete kit to the original EGR valve location. Ensure that all connections are secure and fasten them using the fasteners provided.

Step 2: Connect the new lines

Next, connect the new lines as directed in the instructions. Ensure that all fittings are well sealed to prevent any leaks.

Step 3: Check the quality of the installation

Finally, check that all installation steps are correct. Make sure that all components are securely installed and that all connections are free of leaks. Once this is done, reconnect the battery and start the engine to check if any warning lights come on. If everything is in order, your 6.7 Cummins EGR delete is done.

With a detailed step-by-step guide, you can complete your 6.7 Cummins EGR delete without any problems. The next section will look at how EGR deletion relates to DEF system deletion to help you further optimise your vehicle's performance. Click continue reading to learn more about the DEF system.


4. Deleting the EGR vs. deleting the DEF system

4.1 What is a DEF system?

DEF systems (Diesel Exhaust Fluid systems) are an important part of modern diesel engine emission control.DEF (Diesel Exhaust Fluid) is a fluid made up of urea and deionised water used to neutralise harmful nitrogen oxides (NOx) in diesel emissions. Through Selective Catalytic Reduction (SCR) technology, DEF systems are able to reduce emissions by converting NOx into harmless nitrogen and water vapour.

4.2 Impact of Deleting DEF Systems

Performance Improvement

Deleting the DEF system can significantly improve engine performance. Without the restriction of the DEF system, exhaust flow is smoother and the engine can run at greater efficiency. For diesel engines such as the 6.7 Cummins, 6.0 Powerstroke and Duramax, owners will experience increased power output when the DEF system is removed.

Reduced Maintenance Costs

Maintenance of the DEF system requires the regular addition of DEF fluid and may require the replacement of components such as the SCR catalytic converter. By deleting the DEF system, vehicle owners can save on these maintenance costs and reduce daily operating costs.

Reduced Risk of Breakdown

The electronic control part and injection system of the DEF system are more complex and prone to failure. By deleting the DEF system, vehicle owners can reduce the risk of breakdowns caused by these complex components and improve the reliability and stability of their vehicles.

4.3 SPELAB's DEF Deletion Solution

High performance solutions

SPELAB offers specialised DEF delete solutions designed to improve the performance and reliability of diesel engines. Our DEF Delete kits are precision engineered and rigorously tested to ensure that the engine will continue to run smoothly and efficiently after the DEF system has been removed.

Easy to install

SPELAB's DEF Delete Kits are designed to be simple and easy to install. Even inexperienced car owners can easily follow the instructions and complete the installation process. Our kits are available for a wide range of diesel engines, including 6.7 Cummins, 6.0 Powerstroke and Duramax.

Compliance Advice

Whilst deleting the DEF system can bring many benefits, in some areas this may be illegal and SPELAB recommends that owners are aware of and comply with local environmental regulations to ensure legal compliance before undertaking any modifications. We are committed to providing safe, legal tuning solutions that provide the best possible experience for vehicle owners.

By learning about the Delete DEF system, owners can optimise the performance of their vehicle in a more comprehensive way. Next, we'll explore the legal aspects of EGR deletion to help you understand the legality of EGR deletion in different regions. Read on for more guidance on legal compliance.

5. Legal aspects of EGR deletion

The legality of EGR deletion

In many areas, deleting an EGR system is considered an offence. This is because the EGR system is designed to reduce emissions from diesel vehicles, and deleting it may cause the vehicle to exceed the emission limits. Therefore, it is important to know and follow local laws and regulations before proceeding with EGR deletion.

Which states prohibit EGR deletion

In the United States, some states have clearly defined the legality of EGR deletion and imposed penalties for violators. For example, states such as California and New York have banned EGR deletion, and violators face fines and other legal sanctions. Therefore, car owners in these states need to think carefully and comply with the regulations before proceeding with EGR deletion.

Legal Compliance Retrofit Advice

Although EGR deletion can improve engine performance, it can have serious consequences if local laws and regulations are violated, SPELAB recommends that vehicle owners understand the local legal requirements in detail and ensure that the chosen modification solution complies with the regulations before carrying out any modification. We are committed to providing safe and legal tuning solutions to bring the best possible experience to vehicle owners.

Please be sure to understand and comply with local laws and regulations before performing any EGR delete operation. If you have any questions or need more information, consult a professional or your local legal department. Continue reading the next section to learn about the implications of deleting your EGR system so you can make an informed decision.

6. Long-term effects of EGR deletion on diesel engines

Impact on engine performance

Deleting the EGR system may have a positive impact on the long-term performance of a diesel engine. By improving combustion efficiency and reducing carbon build-up, the engine can achieve smoother operation and maintain a better performance condition over the long term.

Impact on engine life

The presence of an EGR system can lead to carbon build-up in the intake tracts and inside the cylinders, which can affect engine life and reliability. By deleting the EGR system, the formation of carbon build-up can be reduced, prolonging engine life and reducing the risk of breakdowns caused by carbon build-up.

Maintenance and servicing recommendations

Despite the many benefits of deleting the EGR system, regular engine maintenance and servicing is still required. It is recommended that oil, filters and other lubricating components be changed regularly and that the interior of the engine be cleaned regularly to ensure proper functioning. Additionally, it is important to check the condition of the engine in a timely manner and make adjustments and repairs as needed to ensure that the engine is always in tip-top shape.

Knowing the long-term effects of EGR deletion on your diesel engine will allow you to make a more confident decision about whether or not to proceed with this modification. Continue reading the next section to learn more about EGR deletion so you can make an informed decision.


7. Conclusions and recommendations

Through the reading of this article, we have delved into the importance, steps and implications of EGR deletion.EGR deletion kits can significantly improve the performance and reliability of diesel engines, but before proceeding with a retrofit, owners need to take into account aspects such as legal compliance, environmental concerns, and long term implications.

SPELAB's commitment

As a manufacturer dedicated to providing quality automotive performance parts, SPELAB offers high-performance EGR delete kits and DEF delete solutions to a wide range of vehicle owners. Our products are precision engineered and rigorously tested to ensure compliance with legal, regulatory and environmental requirements while enhancing vehicle performance.

If you are considering deleting your EGR system or DEF system, we recommend that you obtain detailed information before proceeding and ensure compliance with local legal and environmental requirements. Visit the SPELAB website today to find out more about the EGR deletion kits and DEF deletion solutions we offer to bring more performance and longer life to your vehicle.

By choosing SPELAB's products, you will receive high quality automotive performance parts as well as a professional after-sales service. We look forward to working with you to bring superior performance and experience to your vehicle!


Q1: Is deleting a 6.7 Cummins worth it? 

A1: Deleting a 6.7 Cummins can be worth it for some owners seeking improved engine performance and efficiency. However, it's essential to consider legal implications and potential impacts on emissions compliance.

Q2: Can you delete DEF on Cummins? 

A2: Yes, it's possible to delete the Diesel Exhaust Fluid (DEF) system on Cummins engines. However, it's important to note that doing so may void warranties and violate emissions regulations in certain areas.

Q3: What is an EGR delete kit? 

A3: An EGR delete kit is a set of components designed to remove the Exhaust Gas Recirculation (EGR) system from a vehicle's engine. It typically includes parts like block-off plates and bypass pipes.

Q4: What is the EGR on a Cummins diesel? 

A4: The EGR (Exhaust Gas Recirculation) system on a Cummins diesel engine is designed to reduce nitrogen oxide emissions by recirculating a portion of the engine's exhaust gas back into the intake system.

Q5: Is EGR delete good for diesel? 

A5: EGR delete can potentially improve diesel engine performance and efficiency by reducing exhaust gas recirculation, lowering intake temperatures, and minimizing carbon buildup. However, its legality and environmental impact should be considered.

Q6: What are the disadvantages of EGR delete? 

A6: Disadvantages of EGR delete may include increased emissions, potential legality issues, and voided warranties. Additionally, it may lead to reduced fuel economy in some cases.

Q7: Is it illegal to delete an EGR on a diesel engine? 

A7: The legality of deleting an EGR system on a diesel engine varies by jurisdiction. In some areas, it may be illegal due to emissions regulations, while in others, it may be permissible for off-road use only.

Q8: In what states is it illegal to delete your truck? 

A8: It's illegal to delete emissions control systems like EGR or DEF on trucks in several states, including California, New York, and Texas. However, regulations may differ across regions, so it's essential to check local laws.

Q9: What happens if I delete EGR without deleting DPF? 

A9: Deleting the EGR system without also removing the Diesel Particulate Filter (DPF) can result in increased soot buildup, reduced engine efficiency, and potential damage to engine components. It's generally not recommended unless both systems are addressed together.

Q10: Can I delete EGR and DEF systems myself? 

A10: While it's technically possible to delete EGR and DEF systems yourself, it's a complex process that requires mechanical expertise and may void warranties. It's advisable to consult with professionals and ensure compliance with local regulations.



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