📈 30-Second Summary: 6.7 Cummins Delete Guide
A full 6.7L Cummins delete unlocks substantial power, delivering 40-150+ HP gains, a 2-4 MPG increase, and an end to restrictive exhaust regenerations. However, these benefits come at the cost of a voided warranty, strict road-use compliance restrictions, and reduced resale avenues. To achieve optimal results, it is critical to match your truck's specific model year and application with a premium EGR Performance Cummins tuning solution while factoring in local regulatory frameworks.
Table of Contents
- Introduction
- What Is a 6.7 Cummins Delete?
- What Are the Core Components of a 6.7 Cummins Delete?
- What Performance Gains Can You Expect After Deleting a 6.7 Cummins?
- How Does a Delete Affect 6.7 Cummins Reliability and Engine Health?
- What Are the Risks of Deleting a 6.7 Cummins?
- How Much Does a 6.7 Cummins Delete Cost?
- Why Do Model Years Matter for 6.7 Cummins Deletes?
- What Tuning Considerations Matter Most for Deletes?
- What to Consider Before Buying a Delete Kit for 6.7 Cummins
- Is Deleting a 6.7 Cummins Worth It?
- What Common Mistakes Should You Avoid with 6.7 Cummins Deletes?
- FAQs
- Summary
Introduction
A 6.7 Cummins delete removes or bypasses the EGR, DPF, and DEF/SCR systems. This change often adds 40-150+ HP, improves MPG by 2-4, and cuts EGTs. It costs $800-$2,500+ but voids warranties and breaks federal law for on-road use. We weigh the real benefits against the risks to help you decide.
Unleash the True Power of Your Inline-Six.
Restrictive factory filters and soot-laden EGR valves choke your engine, trapping heat and shortening its lifespan. Our Off-Road Performance Kits from EGR Performance remove the bottlenecks permanently on competition machines. Experience lightning-fast turbo response, dropping EGTs, and maximized fuel efficiency. Give your 6.7L Cummins the breathing room it needs to dominate.
Shop 6.7L Cummins Delete Kits→You need to understand the modifications to your hardware, tuning, and how the mod impacts you. We put together this guide after years of seeing owners face the same choices. This guide outlines the benefits, costs, reliability changes, and legal concerns, so that you can make an informed and realistic decision.
What Is a 6.7 Cummins Delete?
A 6.7 Cummins delete means removing or bypassing factory emissions gear like EGR, DPF, and SCR/DEF. Full deletes combine all three for smooth operation. Partial deletes target one or two parts, but often lead to issues.
Emissions systems cause many headaches for 6.7 Cummins owners. Regens burn extra fuel and can dilute oil. We see this push many truckers to consider deletes.
Deleting a 6.7-liter Cummins involves removing or bypassing the factory emissions systems that allow the engine to operate as designed. In most cases, this process would involve three different systems:
- 6.7 Cummins EGR Delete: Eliminates the use of exhaust gas recirculation.
- 6.7 Cummins DPF Delete: Eliminates the diesel particulate filter.
- DEF/SCR Delete: Eliminates the fluid-based emissions system.
A best full delete kit for 6.7 Cummins combines all three, while a partial setup removes only selected components. Many people who own a 6.7-liter diesel engine consider deleting their diesel engine for the benefits of reducing regeneration cycles, improving throttle response, and simplifying the overall system. However, there are legal and compliance issues associated with making these modifications.
We always note the legal controversy upfront. Enthusiasts want reliable power. Federal and state rules ban tampering for on-road trucks.
What Are the Core Components of a 6.7 Cummins Delete?
The ECM tuner is the most important part of any 6.7 Cummins delete. It prevents codes and manages sensors. Add DPF pipes, EGR kits, and DEF bypass for a full setup.
One wrong part can leave your truck in limp mode. Many owners learn this the hard way after buying cheap hardware.
A Cummins 6.7 delete kit comes with both hardware and a tuning component to guarantee your truck functions properly.
- An ECM tuner is the most crucial component of a delete kit when it comes to preventing limp modes and controlling your truck's missing sensors.
- The DPF delete pipe replaces your factory's restrictive filter with either a 4-inch straight pipe or a 5-inch straight pipe.
- The EGR delete kit stops exhaust from recirculating through the use of block-off plates and rerouting coolant.
- DEF/SCR bypass disables your fluid-based emissions through computer programming and software adjustments.
A 6.7 Cummins delete with tuner is essential. Hardware alone triggers warning lights and poor drivability.
We recommend quality parts that fit your VIN. Early trucks (2007.5-2012) need simpler kits. Newer ones have more sensors. Always load the tune before removing hardware.
What Performance Gains Can You Expect After Deleting a 6.7 Cummins?
Deleted 6.7 Cummins trucks often gain 40-150+ HP and similar torque. Real gains depend on tune quality. Fuel economy improves 2-4 MPG for many.
Stock 6.7 Cummins feels restricted during hard pulls. Many owners want a sharper response and more power for towing.
When tuned correctly, a 6.7 Cummins delete alters the overall performance of an engine.
- Horsepower & Torque: Generally speaking, gains fall in the range of +40 to +150+ HP. The quality of the tune has more influence than the high number.
- Fuel Economy: A 6.7 Cummins delete kit increases mpg by eliminating fuel-heavy regeneration cycles.
- EGT Reduction: Reducing EGTs improves efficiency, which is especially important when towing.
- Drivability: Improved throttle response and smoother power delivery dramatically improve the feel when driving.
By using a 6.7 Cummins delete kit with a tuner, you can expect these improvements to be consistent and well-controlled.
How Does a Delete Affect 6.7 Cummins Reliability and Engine Health?
Deletes can improve reliability by removing failure-prone parts and stopping regens. This reduces oil contamination and heat stress on the turbo.
Frequent regens worry many Cummins owners. Oil dilution from these cycles can hurt long-term health.
A 6.7 Cummins delete can increase reliability by getting rid of emissions-related parts.
- Reliability Argument: Removing sensors and valves may reduce failure points over time.
- Oil Dilution: Regens dilute the engine oil frequently. A 6.7 Cummins delete kit eliminates regen cycles. <Check 6.7 Cummins Oil Capacity>
- Turbo Heat Stress: Lower EGTs may reduce long-term heat stress on the turbo system.
- Engine Life Debate: Results vary but depend on how well the truck is maintained.
Installing a 6.7 Cummins delete kit with a tuner changes the operating conditions significantly but does not guarantee longer engine life.
What Are the Risks of Deleting a 6.7 Cummins?
Deletes are illegal for on-road use under federal Clean Air Act rules. They void warranties, hurt resale, and raise emissions.
Federal laws still ban emissions tampering. This catches many owners by surprise during inspections. Deleting a 6.7 Cummins diesel engine brings legal and financial consequences, every owner should be aware of.
Federal Law
Under federal regulations, a 6.7 Cummins delete kit is not legal for on-road use in most states. There are many federal laws prohibiting tampering with emissions. If you violate these federal laws, you could be fined or be subject to penalties depending on the level of enforcement of the federal government.
Warranty Risks
The powertrain warranty is usually voided when a Cummins 6.7 delete kit and tuner are installed. Dealers can detect software and hardware changes, even if they're reverted. Any of this can result in denied repair claims.
Inspections
In regulated states, a deleted 6.7 Cummins kit with a tuner does not pass emissions tests. Strict inspection requirements are enforced by states such as California and New York. Failure to register results in difficulty or an inability to renew your registration.
Resale Value
The resale value of noncompliant trucks has a smaller pool of potential buyers. Many dealers do not sell cancelled trucks or price them very low. Deleting trucks lessens their resale flexibility in the future.
Environmental Impact
The environmental ramifications of running a modified truck produce significantly more emissions than stock. These trucks produce far higher NOx and soot emissions than a factory setup, resulting in poorer air quality.
We advise caution here. Know your area rules before any work. Check local laws first: search state DMV site, talk to shops, and keep stock parts for potential reversion.
How Much Does a 6.7 Cummins Delete Cost?
Full 6.7 Cummins deletes cost $800-$2,500+ for parts. Add labor for $1,000-$3,500 total in many cases.
Budget surprises stop many delete projects halfway. Depending upon parts, tuning, and labor, the cost of a 6.7 Cummins delete kit can vary greatly. This is due to different levels of quality and how they are installed.
The overall price of a 6.7 Cummins delete kit system consists of not only hardware, but software and tuning quality also determine overall costs. We see this often with hidden fees.
Cost Breakdown by Component
A DPF delete pipe costs between $300 and $600. EGR kits typically cost between $200 and $400. For a 6.7 Cummins, a complete delete kit with tuner is priced between $600 and $1,200.
Labor may be an additional cost for the installation of a kit. It can range from $300 to $800, depending on the shop rate.
Typical Costs for a Complete Delete Kit
The average cost of a complete delete kit on a 6.7 Cummins is between $800 and $2,500 or more. Factors such as the use of premium tuners and heavy-duty parts can drive up the total cost.
Installation costs on cheaper kits may save you money upfront. However, they could result in unreliability or lower-quality tuning.
DIY vs. Professional Installation
DIY installations save labor. However, they require a thorough understanding of mechanics and tuning to complete correctly. The best 6.7 Cummins delete kit still needs a proper tuning setup to avoid errors. Professional installations reduce risk, but they increase the total cost of the project.
Hidden Costs
Unexpected expenses include the potential for downtime, future repairs, or reinstalling stock equipment. Furthermore, a Ram 6.7 delete kit may create additional costs for resale or inspection in the future. Many owners also underestimate the costs associated with returning their truck to its factory specifications.
DPF pipe: $200-400 | EGR kit: $300-500 | Tuner: $400-800 | DEF bypass: included in tune.
Average full delete runs $2,200 including labor for 2013-2018 models. DIY saves $500-1,500 but risks mistakes.
We recommend quality over cheapest options. Budget in steps: First, buy tuner. Second, get hardware. Third, schedule install.
Why Do Model Years Matter for 6.7 Cummins Deletes?
Model years from 2007.5 to now have big differences in emissions setups. Match parts to your VIN for success.
Newer trucks have more complex emissions controls. This changes what parts we need.
The 6.7 Cummins delete is model-specific. Thus, it varies according to the model year.
Why are Model Years Important?
Emissions systems evolved from 2007.5 onward. What fits older trucks may not apply to newer models regarding a 6.7 Cummins delete. Furthermore, sensors and software change in every generation of trucks.
Early vs. Later Trucks
Earlier trucks are different from later trucks in that later trucks have electronics as well as stricter emissions control. Newer models require advanced tuning. In comparison, older model trucks are generally easier to modify due to their simpler build.
Matching Parts to VIN
Proper fitment of parts is based on VIN, transmission type, and trim level. So, the 6.7 Cummins delete kit and tuner need to be the same specification, or else you create drivability problems and fault codes.
Three Key Periods: Early trucks (2007.5-2012) have simpler systems, easier deletes. Mid years (2013-2018) have reliable base with good aftermarket support. Later trucks (2019+) have more sensors and electronics needing advanced tuners.
What Tuning Considerations Matter Most for Deletes?
A good tuner prevents limp mode and enables safe delete operation. Choose levels like mild, tow, or performance.
Proper 6.7 Cummins tuning determines the reliability and safety of your 6.7 Cummins when deleting the emissions system. Without proper tuning and tuning software, your 6.7 Cummins may go into limp mode and run poorly. We see persistent codes from poor matches.
Why is tuning important?
A 6.7 Cummins delete kit with tuner ensures the ECM recognizes removed components. Thus, it does not throw codes for the missing components, allowing you to maintain a safe running engine.
Tune Level
Typical selectable tunes for the 6.7 Cummins include Performance, Tow, and Mild. All of these tunes typically carry an adjustable parameter for all the different drive styles. Each tune alters the way the Cummins delivers power and consumes fuel.
Common Pitfalls in Tuning
Poor quality tunes result in excessive amounts of smoke, rough shift points, and faulty codes. An incorrectly matched tune to a delete kit for 6.7 Cummins is one of the most common mistakes when it comes to matching a delete kit with its corresponding tuner.
Proper calibration of both the tuner and delete kit ensures you have a truck that performs smoothly.
Golden Rule
Before you begin your delete installation on your truck, you must have your tuner program installed and verified. Removing hardware first can leave the truck undrivable if the software fails.
We prefer tuners with proven track records for Cummins. Select your tune level: Mild for economy/daily driving, Tow for heavy loads, Performance for max HP.
What to Consider Before Buying a Delete Kit for 6.7 Cummins
Consider your truck use, local laws, and reversibility before buying. Full deletes suit off-road or specific needs.
The wrong kit for your truck wastes time and money. Many rush in without checking the laws. Only consider installing a 6.7 Cummins delete kit after proper evaluation of how and where you use your truck, as each configuration has long-term consequences.
Truck Use Case
Decide if your truck is a daily driver, tow rig, or off-road build. Deleting an emissions control system from a 6.7 Cummins engine affects the comfort, reliability, and limits of usage of the truck.
Local Emissions Laws
Before installing a 6.7 Cummins delete kit with a tuner, check your local regulations regarding emissions. Some states impose strict emission compliance to register and inspect your truck.
Availability For Tuning
A verified tune for your specific VIN is essential. If you use the best 6.7 Cummins delete kit without the proper tuning support, you may have drivability issues.
Reversibility
It is wise to retain all stock parts in case you wish to go back to the factory setup. A Ram 6.7 delete kit can be both hard and expensive to undo.
Point Of No Return For Emissions Compliance
Once installed, many modifications to a 6.7 Cummins delete kit change the emissions compliance of the truck, and those can be very difficult, if not impossible, to fully undo.
We suggest off-road only for compliance peace of mind. Make a checklist: First, assess your use case. Second, research local laws. Third, buy matched parts.
Is DIY or Professional Install Better for 6.7 Cummins Deletes?
DIY works for experienced owners with tools. Hire pros for complex trucks or tight schedules.
A 6.7 Cummins delete can be done DIY or by a professional, depending on experience and risk level. DIY saves cash but risks big mistakes. Pros avoid downtime.
When DIY Makes Sense: DIY works for experienced owners with proper tools, mechanical skills, and time to complete the job carefully. A 6.7 Cummins delete kit still requires careful setup and tuning knowledge. Mistakes can lead to fault codes or drivability issues.
When to Hire Pro: A professional install is better for daily drivers or heavy towing use. A delete kit for 6.7 Cummins needs correct tuning integration to avoid limp mode and downtime. Complex newer models with more sensors benefit from professional experience.
Pre-Installation Checklist: Before installing a 6.7 Cummins delete kit with tuner, confirm fitment, get parts ready, tune loaded, and rollback plan in place.
Decide based on your skills: First, rate your mechanical ability honestly. Second, get quotes from trusted shops. Third, prepare your truck and workspace.
Is Deleting a 6.7 Cummins Worth It?
Deletes work well for reliability and off-road performance goals. They do not suit warranty or emissions-tested trucks.
Many owners debate deleting after facing repair bills. The answer depends on your situation. When it comes to a 6.7 Cummins delete, the best thing to do is determine what your goals and restrictions are. <Learn pros and cons of 6.7 Cummins delete>
When It's Worth It
Off-road builds or performance-oriented applications may benefit from being deleted. The 6.7 Cummins deletion enhances drivability and reduces emissions-related maintenance concerns in non-street use cases.
When It's Not Worth It
For emissions-controlled areas or warranty-concerned owners, a delete kit for 6.7 Cummins is probably not a good decision, as it will decrease your resale value and limit your legal road use.
Evaluation Framework
Evaluate the total cost, legal exposure, and long-term ownership plans. A delete kit with a tuner is a good option as long as you are aware of and comfortable with all potential risks to your specific use case.
In our experience, EGR Performance delete kits stand out as the best choice. Their support, quality parts, and reliable tunes solve problems better than others. We recommend them for strong results.
What Common Mistakes Should You Avoid with 6.7 Cummins Deletes?
Avoid buying before a fitment check, skipping good tuners, or removing hardware first.
Cheap parts and bad orders cause most delete failures. We see these errors repeat. A 6.7 Cummins delete causes big problems that can be avoided if the delete is planned properly. A majority of the issues can be traced back to incorrect preparation or poor part selection.
Wrong Fitment
Purchasing a delete kit without verifying the correct year, make, and model of your truck leads to issues when installing the delete kit. It is important to ensure that you match the specifications to the actual type and configuration of your truck before purchasing.
Weak Tuning Choice
Having an improper tuner is also a major problem if you are trying to delete your truck's emissions. If you have a subpar tuning process, you have a good chance of your truck triggering limp mode and fault codes.
Cheap Kits
Selecting a low-cost delete kit for a 6.7 Cummins truck leads to purchasing low-quality parts that provide unreliable performance. Quality matters more than price.
Removing Hardware Too Early
Before the tune is implemented and verified, don't take out any stock emissions components. There is no active software support for a 6.7 Cummins delete kit, and as a result, the truck does not run after parts are taken out.
Follow this order: First, confirm fitment for your exact year and model. Second, get quality tuner. Third, load tune BEFORE removing any hardware. Stay patient for best outcomes.
Recommended Resources:
EGR Delete: Step-by-Step 6.7 Cummins EGR Delete Instructions
CCV Reroute: 6.7 Cummins CCV Reroute & Delete DIY Guide
FAQs
Is deleting a 6.7 Cummins legal?
No. A 6.7 Cummins delete kit is not legal for on-road use in many regions due to emissions laws.
Will deleting 6.7 Cummins void my warranty?
Yes. A 6.7 Cummins delete kit with tuner usually voids powertrain and emissions warranties immediately.
Can a deleted 6.7 Cummins pass inspection?
No. A delete kit for 6.7 Cummins will fail emissions testing in regulated states and regions.
How much does a full 6.7 Cummins delete cost?
A 6.7 Cummins delete kit typically costs $800 to $2,500+, depending on parts and tuning.
What does a full delete on a 6.7 Cummins include?
It includes EGR, DPF, and DEF/SCR removal plus tuning. The best 6.7 Cummins delete kit combines all components.
Do you need a tuner for a 6.7 Cummins delete?
Yes. A 6.7 Cummins delete kit with tuner is essential to prevent limp mode and fault codes.
Is it better to do a partial delete or a full delete?
A best full delete kit for 6.7 Cummins is more consistent, while partial deletes may cause tuning and drivability issues.
Can I install a 6.7 Cummins delete kit myself?
Yes, but only with strong mechanical and tuning knowledge. A delete kit for 6.7 Cummins is not beginner-friendly.
Does deleting a 6.7 Cummins increase engine life?
Not guaranteed. A 6.7 Cummins delete kit may reduce regen-related stress, but maintenance still matters.
How much horsepower can a deleted 6.7 Cummins gain?
A 6.7 Cummins delete kit with tuner can add +40 to +150+ HP, depending on tune quality.
Does deleting a 6.7 Cummins improve fuel economy?
Yes, some owners report gains after installing a 6.7 Cummins delete kit due to fewer regen cycles.
What happens if I remove the hardware before loading the tune?
The truck may enter limp mode or become undrivable. Always install the 6.7 Cummins delete kit with tuner first.
Summary
The 6.7 Cummins engine delete modification is an all-encompassing system-wide modification (not just a bolt-on upgrade). It affects your performance, reliability, and legal compliance significantly.
Before purchasing a 6.7 Cummins delete kit, balance the performance improvements against potential legal issues, warranty issues, and financial risks. Verify your tuning, know your truck's setup, and check your local laws before using any 6.7 Cummins delete kit.
A delete kit for 6.7 Cummins should only be installed with full awareness of long-term consequences. EGR Performance gives the best kits and support for reliable results. Know your truck and local rules first.
