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Is an EGR Delete Right for 6.7L Cummins? Here's Everything You Need to Know
March 10, 2026

Is an EGR Delete Right for 6.7L Cummins? Here's Everything You Need to Know

🔑 Key Takeaways
  • An EGR delete on the 6.7L Cummins delivers 15-30 HP and 1-3 MPG improvement by eliminating exhaust gas recirculation
  • The #1 reliability benefit is preventing EGR cooler failure—a $2,000-$4,000 repair that affects most trucks by 100k miles
  • Legal compliance is the biggest trade-off: federal law prohibits emissions tampering on street-registered vehicles
  • Quality components and professional tuning are essential—cheap kits can cause drivability issues and engine damage

The Exhaust Gas Recirculation (EGR) system is an essential component of modern diesel engines. Its operating principle is straightforward yet critical: it redirects a portion of exhaust gases back into the engine's intake system. This process lowers combustion temperatures, which significantly reduces the formation of nitrogen oxides (NOx). This system helps vehicles meet increasingly stringent environmental regulations.

However, this emission control system brings its own set of problems in real-world operation. Over time, carbon particles in the exhaust accumulate within the EGR valve, cooler, and intake system. This buildup not only hinders engine efficiency but also leads to reduced fuel economy and a noticeable drop in power. These practical issues are the primary reasons why many owners of 6.7-liter Cummins engines are exploring the EGR delete kit as a modification option.

Why Consider Removing the EGR System?

Releasing Hidden Power

  • When the EGR system is no longer recirculating exhaust gas, the engine can ingest a higher volume of fresh, oxygen-rich air
  • This enables more complete and efficient fuel combustion
  • The immediate, noticeable result is sharper throttle response and smoother acceleration
  • The increase in available power is especially noticeable during hard pulls, like climbing steep grades or overtaking on the highway

Lower Maintenance Costs

  • The EGR system is one of the more failure-prone components on a modern diesel
  • Common issues include clogged or leaking EGR coolers and stuck EGR valves, leading to expensive repairs
  • By removing this system entirely, you eliminate the source of these problems at their root

Improved Fuel Economy

  • Better combustion efficiency directly translates to using less fuel
  • Without the EGR system impeding the intake process and introducing inert gas, the engine operates more efficiently
  • Many owners report a tangible decrease in fuel consumption, particularly during long highway trips or when hauling heavy loads

EGR Removal Considerations for Different Model Years

Caution for Owners of 2019-2024 Models

Cummins engines from this period are equipped with more complex emission control systems. With increasingly strict environmental laws, performing an EGR delete on these newer trucks is much more complicated.

Key Challenges:

  • After removing the EGR system, the vehicle's ECU will detect the change, triggering a check engine light
  • For owners in areas with emissions testing, an EGR delete will almost certainly result in a failed inspection
  • A successful modification on these models typically requires professional ECU tuning and adjustments to the DEF system

2010-2018 Models:

On 6.7 Cummins engines from this era, like those found in the 2012 or 2015 Ram 3500, EGR system failures are a well-known and common issue.

Common Observations:

  • Under heavy load or during frequent stop-and-go driving, the EGR cooler is prone to clogging, cracking, or failing
  • Owners who have deleted the EGR system on these trucks consistently report more stable engine operating temperatures
  • Throttle response is noticeably improved across the RPM range
  • The overall driving experience is significantly enhanced, especially when towing

2007.5-2009 Models:

As the earliest versions of the 6.7 Cummins with EGR technology, these trucks have a somewhat simpler emissions setup.

Why These Models Are Different:

  • Models like the 2007 Ram 3500 or 2008 Dodge with the Cummins are particularly prone to carbon buildup issues
  • They face fewer legal restrictions regarding modifications compared to newer trucks
  • On these older trucks, an EGR delete provides a very direct and noticeable improvement in power and fuel economy

The Tangible Benefits of an EGR Delete

Substantial Performance Gains

Removing the EGR system fundamentally changes the engine's internal operating environment. Without exhaust gas diluting the intake charge, each power stroke benefits from more oxygen.

Performance Improvements:

  • Not just a peak horsepower gain, but a noticeable increase in torque across the entire RPM range

  • The engine pulls harder under load and responds more quickly to throttle inputs

  • When combined with a proper ECU tune, even can deliver more impressive and satisfying performance

Real-World Fuel Savings

Improved combustion efficiency directly translates to money saved at the pump. When the engine isn't struggling to process recirculated exhaust, it burns fuel more completely.

Fuel Economy Benefits:

  • For owners who regularly tow, haul heavy loads, or cover long distances, this improvement is one of the most appreciated benefits

  • The increased range on a tank of fuel is a frequently mentioned advantage in owner forums and reviews

  • Some users report improvements of 1-3 MPG depending on driving conditions and tuning

Long-Term Engine Cleanliness

The EGR system continuously introduces exhaust soot into the intake manifold. Over tens of thousands of miles, these carbon particles accumulate on critical components.

Cleanliness Advantages:

  • Intake valves and combustion chambers stay cleaner without constant soot exposure

  • This prevents carbon buildup that can affect valve sealing and alter compression ratios

  • Eliminates rough engine operation caused by uneven carbon deposits

  • Reduces the need for expensive professional carbon cleaning services

  • Helps maintain optimal engine performance over a longer service life

Choosing a High-Quality EGR Delete Kit

If you decide to move forward with an EGR delete, investing in a quality kit is essential for a successful installation.

Precision Engineering

The best kits are designed to be a direct, bolt-on replacement. Blocking plates, coolant reroute components, and other parts should match factory mounting points precisely. Proper fitment ensures a leak-free and reliable installation. Avoid universal kits that require modification to work properly with your specific engine.

High-Temperature Materials

Durability in the engine bay is critical. Quality kits use aerospace-grade aluminum or stainless steel that withstands high heat without warping or corroding. The materials must resist cracking and degradation over time. Included gaskets and fasteners should be specifically designed for long-term, high-heat service conditions.

Complete Kits and Documentation

A good EGR delete kit should come as a complete package. This includes all necessary blocking plates, coolant hoses or adapters, bolts, and clamps. Clear, step-by-step instructions are invaluable, especially for DIY installers. Video tutorials or access to technical support is a bonus feature that can save significant time and frustration during installation.

Professional-Grade EGR Delete Solutions for 6.7 Cummins

2010-2024 6.7L Cummins Dodge Ram EGR Throttle Valve Cooler Delete Kit

This EGR delete kit is engineered specifically for off-road use, providing a complete solution for removing the problematic EGR system from your 6.7 Cummins.

The 2010-2024 6.7L Ram EGR Cooler upgrade Kit ecifically designed for off-road use.

Key Features:

  • Constructed from high-quality aluminum and silicone for durability and heat resistance

  • Specifically designed for off-road and competition use only

  • Eliminates carbon buildup and the troublesome EGR valve once and for all

  • Prevents high-temperature exhaust gases from being reintroduced into the engine

  • Complete replacement of both the EGR valve and EGR cooler

  • Includes everything needed for installation, no additional parts required

Vehicle Compatibility:

  • Fits 2010-2024 Dodge Ram 2500 and 3500 diesel pickups equipped with the 6.7-liter Cummins engine

  • Does not fit cab and chassis models

2013-2018 6.7L Dodge RAM 2500 3500 Cummins Diesel EGR Delete Cooler Throttle Valve Delete Kit

Designed specifically for 2013-2018 model years, this professional EGR delete kit offers enhanced features for those looking to monitor exhaust temperatures while eliminating the EGR system.

The 2013-2018 6.7L Dodge EGR upgrade kit offers users better performance.

Key Features:

  • Premium aluminum and silicone construction throughout

  • Pre-tapped manifold blocking plate allows for direct EGT probe installation, making it easy to monitor exhaust temperatures

  • High-temperature exhaust gases are completely diverted away from the engine intake

  • Full replacement of the EGR valve and EGR cooler with no additional components needed

  • Engine coolant circulates faster and more efficiently compared to the factory EGR system

Vehicle Compatibility:

  • Specifically engineered for 2013-2018 6.7L RAM Cummins 2500 and 3500 diesel turbo models

2019-2024 6.7L Ram 4-Inch / 5-Inch DPF Delete DP-Back Pipe and EGR Delete Kit

For owners of the newest generation 6.7 Cummins, this comprehensive kit combines EGR removal with a high-flow exhaust solution for maximum performance gains.

The 2019-2024 6.7L Ram 4" / 5" DPF and EGR upgrade kit achieves the maximum improvement in performance.

Key Features:

  • Constructed from 409 stainless steel and aluminum for exceptional durability

  • Factory-spec hangers ensure easy installation and perfect fitment

  • Pre-tapped manifold blocking plate accommodates direct EGT probe installation

  • Engineered coolant routing delivers coolant to the rear of the cylinder head

  • Installs directly on the engine without the need to deal with exhaust studs

  • Designed for maximum flow, making it ideal for competition and off-road applications

  • Includes a downpipe-back exhaust system for comprehensive performance improvement

  • Features a turndown exhaust tip for a clean, finished appearance

Vehicle Compatibility:

  • Fits 2019-2024 RAM 2500 and 3500 models

  • Does not fit 2500 models equipped with air suspension or cab chassis configurations

Common Installation Challenges

While installing an EGR delete kit is routine for professional diesel shops, DIYers may encounter several hurdles:

Technical Difficulties:

  • EGR components are often located in tight spaces within the engine bay, making some bolts difficult to reach

  • Parts that have been subjected to high heat for years can be seized, requiring patience and specialized techniques

  • Rust and carbon buildup can make disassembly more time-consuming than anticipated

Tuning Complications:

  • ECU tuning is a major challenge for inexperienced modifiers

  • Without the proper software, hardware, and experience, a poorly executed tune can cause engine damage

  • Incorrect tuning can lead to excessive exhaust temperatures, poor drivability, or reduced fuel economy

  • Seeking out a reputable tuner or using a high-quality, pre-loaded tuner is the best way to avoid these issues

The Downsides You Can't Ignore

Environmental Responsibility

The most direct consequence of an EGR delete is a significant increase in NOx emissions. These pollutants are a key contributor to smog and acid rain, negatively impacting air quality and public health.

Environmental Considerations:

  • A deleted truck can emit several times more NOx than a stock vehicle

  • Owners choosing this modification should acknowledge its environmental impact

  • Consider whether the performance gains justify the increased emissions

Legal and Compliance Risks

In many U.S. states, particularly those that follow CARB standards, removing the EGR system is illegal.

Legal Consequences:

  • Inspection stations in regulated areas are trained to look for tampering with emissions equipment

  • If a deleted system is detected, the vehicle will fail its emissions test

  • In more serious cases, owners could face fines or penalties from environmental regulatory agencies

  • Selling a deleted truck can be difficult in regulated states

Voiding Your Warranty

For newer trucks still under factory warranty, an EGR delete will almost certainly void the powertrain warranty.

Financial Risks:

  • If the engine develops a problem later on, the owner is responsible for the full cost of repairs

  • Some dealerships may flag the VIN, affecting future trade-in or resale value

  • Extended warranties and service contracts will also be invalidated

Conclusion

The 6.7 Cummins EGR delete kit offers a clear technical path for owners seeking greater performance, delivering well-documented benefits including sharper throttle response, improved fuel economy, and enhanced engine cleanliness by eliminating carbon buildup. However, these performance gains come with significant trade-offs, including increased NOx emissions, legal risks in states with strict emissions testing, and the potential voiding of factory warranties on newer trucks. Before making your decision, carefully evaluate your local regulations and performance goals. If you decide to move forward, explore our selection of premium EGR delete kits at www.seguler.com—we offer model-specific solutions with precision engineering, high-temperature materials, and complete installation hardware to ensure your truck performs at its best.

FAQs About 6.7L Cummins EGR Delete Kit

Q1: Will removing the EGR system damage my 6.7 Cummins engine?

A1: No, as long as you use a high-quality delete kit and proper ECU tuning, removing the EGR system will not harm your engine. In fact, many owners report that after removing this system, their engine runs cleaner and cooler, which can actually help extend its overall lifespan.

Q2: Can I reverse an EGR delete if I change my mind later?

A2: Yes, it is reversible, but the process is somewhat involved. You will need to reinstall all the factory EGR components and have the ECU reprogrammed or returned to its stock calibration. It is highly recommended to have this type of work handled by a professional shop or technician to ensure everything functions correctly after restoration.

Q3: What should I look for when choosing the best EGR delete kit for my 6.7 Cummins?

A3: When selecting a kit, focus on material quality and design. Premium kits are typically constructed from stainless steel or aluminum and include complete coolant bypass provisions. They should also be compatible with factory mounting points and work seamlessly with popular tuning devices. Brands like DynoVox are widely recognized by owners for their durability and proven performance.

Q4: Can an EGR delete kit help reduce wear on my 6.7 Cummins engine?

A4: Absolutely. By completely eliminating the exhaust gas recirculation process, an EGR delete kit prevents carbon buildup from accumulating in the intake system. This reduces wear on critical internal components and improves long-term reliability and stability.

Q5: How long will a deleted 6.7 Cummins engine last?

A5: When properly tuned and driven responsibly, a modified 6.7 Cummins engine can achieve a lifespan comparable to a stock engine. The key factors are driving habits and regular maintenance. Aggressive driving or improper tuning settings can accelerate component wear. Therefore, proper calibration and consistent maintenance are essential for ensuring long-term, reliable operation.

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