Best Delete Kit for 6.7 Cummins: SPELAB Buyer’s Guide 2026

Updated by John Lee (Lead Mechanical Engineer) on May 8, 2026.

Featured Snippet Target: The best EGR DPF delete kit for a 6.7 Cummins depends on your Ram model year, exhaust layout, cab configuration, tuner support, and intended legal use. A complete off-road setup typically includes a DPF delete pipe, EGR delete components, DEF/SCR-related calibration support, and a compatible tuner. Some owners report stronger throttle response, fewer regen-related issues, and possible MPG or power gains with proper tuning, but results vary by truck condition, tune quality, exhaust size, transmission limits, and supporting modifications.

If you own a Ram 2500 or 3500 powered by the 6.7L Cummins, you already know the platform is built to work. You may also know the frustration of DPF regeneration cycles, EGR soot buildup, DEF/SCR warnings, limp mode, and expensive emissions-system repairs. That is why many owners search for the best EGR DPF delete kit for 6.7 Cummins.

This guide explains what a complete 6.7 Cummins delete kit includes, how to choose the right setup by model year, why tuner compatibility matters, how 4-inch and 5-inch exhaust options compare, what installation mistakes to avoid, and what legal risks you need to understand before spending money.

Unlike a simple product list, this guide treats a delete kit as a complete system. A proper setup is not just one pipe or one block-off plate. It involves year-specific hardware, exhaust fitment, coolant routing, ECU calibration, and, in many cases, transmission strategy.

Top Picks: Best 6.7 Cummins Delete Kit Setups

If you are comparing delete kit options, start with your use case. The “best” kit is not always the most expensive one. It is the setup that matches your Ram year, cab configuration, exhaust diameter, tuner support, and intended legal use.

Quick Buyer’s Verdict: What Should You Buy?

Recommended Cummins product path

2019-2023 6.7 Cummins All-in-One Delete Kit

This is the primary product path for Ram 6.7 Cummins owners comparing a complete setup. Open the product page to verify model-year fitment, included DPF, DEF, EGR, and CCV components, and current buying options before choosing separate parts.

DPF/DEF/EGR All-in-One Delete Kit for 2019-2021 Dodge Ram 6.7L Diesel 2500 3500

$109.77

In stock - verify fitment

View Cummins kit Browse other Cummins kits

Why 6.7 Cummins Owners Consider EGR and DPF Delete Kits

Modern 6.7L Cummins engines use several emissions systems to reduce pollutants. These systems serve a legal and environmental purpose, but they can also create real maintenance costs as mileage increases. For owners using trucks in off-road, race, farm, export, or legally permitted applications, delete kits are often researched as a way to simplify the system and reduce certain failure points.

DPF — Diesel Particulate Filter

The Diesel Particulate Filter captures soot from the exhaust stream. When soot loading reaches a threshold, the truck performs a regeneration cycle to burn off accumulated soot. Short trips, excessive idle time, towing conditions, sensor failures, or incomplete regeneration can lead to frequent warnings or filter restriction.

When a DPF becomes severely restricted or ash-loaded, repair or replacement can become expensive. Some owners research a 6.7 Cummins DPF delete pipe for off-road or legally permitted use, but this should not be confused with a street-legal repair.

If you are still learning how DPF systems work, start with our beginner guide: What is DPF Delete?. It explains what the DPF does, why diesel owners consider deleting it, and why tuning and legal compliance matter.

EGR — Exhaust Gas Recirculation

The EGR system routes some exhaust gas back into the intake to reduce combustion temperature and NOx emissions. Over time, soot can contaminate the intake path, EGR valve, EGR cooler, grid heater area, and MAP sensor. If you want a deeper explanation of the process, read our guide on deleting EGR on a 6.7 Cummins engine or compare the pros and cons of a 6.7 Cummins EGR delete.

DEF / SCR — Diesel Exhaust Fluid and Selective Catalytic Reduction

Later 6.7 Cummins trucks use DEF/SCR systems to reduce NOx emissions. DEF pumps, dosing modules, heaters, sensors, or wiring issues can trigger warnings or limp-mode behavior. DEF/SCR delete-related calibration is legally sensitive and should only be considered for vehicles and use cases where emissions modification is legally permitted.

What Does a Complete 6.7 Cummins Delete Kit Include?

A complete 6.7 Cummins delete kit is a system, not a single part. The exact components vary by model year, emissions layout, cab configuration, and intended use, but most complete off-road bundles involve the following categories.

1. DPF Delete Pipe

The DPF delete pipe replaces the factory DPF and, depending on the layout, related exhaust sections with a 4-inch or 5-inch pipe. Look for stainless steel construction, correct flange patterns, proper hangers, included hardware, and fitment for your exact year and cab configuration.

2. EGR Delete Kit

A 6.7 Cummins EGR delete kit may include block-off plates, coolant bypass components, throttle valve-related hardware, and gaskets depending on the model year. Coolant routing matters. Poor coolant reroute or trapped air can cause overheating.

3. DEF/SCR-Related Calibration Support

Some setups require ECU calibration to prevent DEF/SCR-related fault codes when hardware is modified. Do not assume every tuner or firmware version supports your model year. For newer trucks especially, compatibility can change quickly.

4. Performance Tuner

The tuner is one of the most important parts of the system. Without proper ECU calibration, the truck may trigger diagnostic trouble codes, limp mode, reduced power, or sensor logic problems. A tuner should be chosen based on model year, emissions layout, transmission strategy, power goal, and available support.

Recommended SPELAB 6.7 Cummins Delete Kit Setup

For off-road, race, or legally permitted Cummins builds, SPELAB offers year-specific 6.7 Cummins components. The example below highlights a 2013–2018 Ram 6.7L Cummins EGR cooler and throttle valve delete kit. For a full parts checklist, see the Gear Up section below.

SPELAB 2013–2018 Ram 6.7L Cummins EGR Cooler & Throttle Valve Delete Kit

Fitment: 2013–2018 Dodge Ram 2500 / 3500 6.7L Cummins Diesel.

Designed for off-road, race, or legally permitted applications where EGR-related components are being addressed as part of a year-matched setup.

Check Fitment

What Are the Real Benefits of a 6.7 Cummins EGR DPF Delete Kit?

Delete kit discussions often focus on big horsepower numbers. Real-world results are more complicated. In legally permitted off-road setups, some owners report improved throttle response, reduced exhaust restriction, fewer DPF-related maintenance events, and possible MPG or power gains when proper tuning is used. However, exact numbers are not guaranteed.

EZ Lynk vs EFI Live vs RaceMe Ultra: Which Tuner Should You Choose?

Your tuner choice determines whether the hardware works correctly. It also affects drivability, power delivery, transmission behavior, and how easy it is to update or troubleshoot the truck later.

For Cummins owners comparing tuning paths, SPELAB offers broader diesel tuner options, including app-based EZ Lynk delete tuners and select H&S Mini Maxx tuner options where compatible and legally permitted.

For 2019–2024 Trucks: Confirm Compatibility First

For 2019–2024 Ram 6.7L Cummins trucks, tuner compatibility changes frequently because of updated ECM security and changing aftermarket support. Do not assume an older tuner or older firmware will work. Confirm current compatibility with the tuner provider, calibrator, or retailer before purchasing.

Which 6.7 Cummins Model Years Need Which Delete Components?

The 6.7L Cummins platform changed significantly over time. Year-specific kit selection is essential. The biggest correction to remember: early 2007.5–2009 6.7 Cummins trucks did have EGR and DPF, but they did not have the later factory DEF/SCR system.

Note: Early 2007.5–2009 6.7 Cummins trucks are sometimes mistakenly described as “EGR only.” In reality, these trucks used EGR and DPF systems but did not have the later factory DEF/SCR setup. Always verify your emissions layout before ordering parts.

Cab & Chassis vs. Pickup Fitment

Cab & Chassis trucks often use different exhaust routing, hangers, wheelbase layouts, and emissions-component positioning than standard pickup models. Always confirm whether a kit is for pickup or C&C before ordering.

4-Inch vs 5-Inch Exhaust: Which Size Is Better for a 6.7 Cummins Delete?

Pipe diameter matters, but bigger is not always better. For many Ram 2500 / 3500 owners, a 4-inch system is easier to route, easier to live with, and more than enough for moderate setups. A 5-inch system makes more sense when airflow demand is much higher.

Full Delete Kit vs DPF-Only Pipe: Which Is Better?

A partial setup may seem cheaper upfront, but it can leave other emissions-system issues unresolved. For off-road or legally permitted builds, many owners prefer a complete, year-matched package because the hardware, sensors, exhaust layout, and calibration can be planned together. However, the right scope depends on vehicle use, local law, budget, and whether the truck still needs to pass inspection.

Transmission Reality Check: 68RFE vs Aisin

The 6.7 Cummins can handle serious torque, but the transmission is often the limiting factor once torque is increased. The 68RFE especially needs responsible tuning and conservative torque management when power is added.

How Hard Is It to Install a 6.7 Cummins Delete Kit?

This is not a beginner maintenance job. Installation difficulty depends on rust, model year, exhaust layout, coolant routing, tuner workflow, and whether you are working on a pickup or Cab & Chassis truck. Professional installation is recommended for many owners.

Before You Start

1. Scan and record existing DTCs: Know what codes were already present before modifying anything.
2. Let the engine cool completely: EGR and coolant work can burn you if rushed.
3. Use penetrating oil: On 2013–2018 trucks especially, soak DPF flange bolts the night before.
4. Confirm tune and firmware: Do not start removing hardware until the tuner and calibration support are confirmed.
5. Keep stock parts: Store the DPF, sensors, clamps, and brackets in case the truck must be returned to factory configuration later.

Common Installation Mistakes

• Not burping the coolant system: Air trapped after EGR coolant rerouting can cause overheating.
• Damaging sensors: Remove and label exhaust sensors carefully before removing the factory assembly.
• Wrong cab configuration: Pickup and Cab & Chassis exhaust routing can differ.
• Wrong tuner support: A hardware kit without compatible tuning is not a working setup.
• Over-aggressive tuning: Big torque numbers can damage a weak transmission.

Gear Up: SPELAB Parts to Check Before You Buy

Before ordering a delete-related setup, confirm your model year, cab configuration, exhaust diameter, tuner support, and legal use. Then compare the SPELAB categories below.

Core Delete Components

• 6.7 Cummins DPF Delete Pipe — For off-road exhaust restriction reduction and 4-inch / 5-inch pipe selection.
• 6.7 Cummins EGR Delete Kit — For EGR cooler, throttle valve, coolant reroute, and soot-related setups.

Tuning Support

• EZ Lynk Delete Tuner — For compatible tuning support where legally permitted.
• Diesel Tuner Collection — Compare tuner options before removing emissions-related hardware.

Supporting Upgrades

• CCV/PCV Reroute Kit — Helpful for reducing oil vapor contamination in the intake path where legally permitted.
• Cold Air Intake Kit — Supporting airflow upgrade for tuned, towing, or higher-load applications.
• All Cummins Applicable Products — Browse SPELAB parts built for Cummins diesel applications.

If You Cannot Delete: Legal and Maintenance Alternatives

For street-driven trucks or emissions-tested areas, maintaining or repairing the factory system is usually the safer and more compliant path. These alternatives can address many symptoms without removing emissions equipment:

If your truck is still street-driven, basic maintenance may solve some symptoms before emissions hardware is removed. Start with correct oil service using our 6.7 Cummins oil capacity and maintenance guide, then inspect MAP sensor readings, EGR cooler condition, DEF/SCR sensors, and DPF regeneration behavior.

• Perform a proper forced regen diagnosis: Identify whether the problem is soot loading, sensor failure, short-trip use, or another fault.
• Clean or replace the MAP sensor: A dirty MAP sensor can cause poor readings and drivability problems.
• Inspect the grid heater and intake tract: Soot buildup can restrict airflow.
• Repair or replace a failing EGR cooler: Coolant loss, white smoke, or overheating should be addressed quickly.
• Check DEF/SCR sensors and dosing components: Many warning lights are sensor or dosing-related rather than catastrophic failures.
• Consider a CCV/PCV reroute where legal: Reducing oil vapor contamination may help slow intake sludge formation.
• Maintain fuel filtration: Clean fuel and good filtration are critical on tuned or hard-working trucks.

Related 6.7 Cummins Guides

• How To Delete EGR on 6.7 Cummins — Step-by-step EGR-focused guide.
• Ultimate Guide: Deleting EGR on 6.7 Cummins Engine — Deeper technical explanation of EGR-related issues.
• 6.7L Cummins EGR Delete: Pros and Cons Explained — Compare benefits, risks, and legal considerations.
• What Is DPF Delete? — Beginner-friendly DPF delete explanation.
• 6.7 Cummins Oil Capacity & Maintenance Tips — Maintenance guide for street-driven Cummins trucks.

Legal Considerations: Know Before You Buy

This is the section you should read before buying anything. Removing or disabling emissions-control equipment can violate federal, state, and local regulations. Even if a product is marketed for off-road, race, farm, export, or specialized use, buyers should verify whether the vehicle, engine, and intended use are actually legally exempt.

Frequently Asked Questions

Q: What is the best delete kit for a 6.7 Cummins?

A: The best 6.7 Cummins delete kit depends on your model year, cab configuration, exhaust diameter, tuner compatibility, and intended use. For off-road or legally permitted applications, most owners should look for a complete year-matched setup that includes DPF pipe, EGR components, calibration support, and a compatible tuner.

Q: What is the best EGR delete kit for a 6.7 Cummins?

A: The best EGR delete kit should include year-correct block-off hardware, coolant reroute components, gaskets, and fitment support for your exact Ram 2500/3500 configuration. For 2013–2018 trucks, SPELAB offers a 6.7 Cummins EGR cooler and throttle valve delete kit designed for off-road or legally permitted applications.

Q: What is the best DPF delete kit for a 6.7 Cummins?

A: The best DPF delete setup depends on your model year, cab configuration, and exhaust diameter. Most moderate builds use a 4-inch pipe, while 5-inch pipes are better suited to high-flow competition setups. Always pair hardware with compatible tuning support where legally permitted.

Q: What does a 6.7 Cummins delete kit include?

A: A complete setup may include a DPF delete pipe, EGR delete components, DEF/SCR-related calibration support, tuner, gaskets, clamps, block-off plates, and sometimes CCV/PCV reroute parts. Exact contents vary by model year and truck configuration.

Q: How much power can a 6.7 Cummins delete kit add?

A: In off-road or legally permitted applications, owners often report noticeable power gains when delete hardware is paired with proper tuning. However, exact horsepower or torque depends on tune level, turbo condition, fuel system, exhaust setup, transmission limits, and supporting modifications. No HP or MPG figure should be treated as guaranteed.

Q: Is a tuner mandatory even for a DPF-only delete?

A: Yes. A modern 6.7 Cummins uses sensors and ECU logic to monitor emissions systems. Removing hardware without proper calibration can trigger fault codes, limp mode, reduced power, or drivability problems. Tuning compatibility should be confirmed before hardware is removed.

Q: What is the best tuner for a 6.7 Cummins delete?

A: EZ Lynk is popular for app-based support and DIY-friendly workflows, EFI Live is commonly used for custom professional calibration, and RaceMe Ultra may be considered for some older trucks. The best tuner depends on model year, tune availability, power goal, and current firmware support.

Q: Can I use an older tuner on a 2019–2024 Ram 6.7 Cummins?

A: Do not assume so. 2019–2024 trucks have more complex ECM security and changing aftermarket support. Confirm current compatibility with your tuner provider, calibrator, or retailer before buying.

Q: What do forums say about 6.7 Cummins delete kits?

A: Forum discussions often emphasize three points: do not skip the tuner, confirm year-specific fitment, and avoid the cheapest no-name hardware if it has poor flange, hanger, or gasket quality. Use forum feedback as a starting point, not a substitute for professional fitment verification.

Q: Is a full delete kit better than a DPF-only pipe?

A: For off-road or legally permitted builds, a full year-matched setup is often easier to plan because DPF, EGR, DEF/SCR logic, sensors, and tuning can be addressed together. A DPF-only pipe may be cheaper upfront but can leave other emissions-related issues unresolved.

Q: What size exhaust do I need after a DPF delete?

A: For most 6.7 Cummins owners, 4-inch exhaust is the practical choice. It is easier to route and works well for many moderate builds. A 5-inch system is better suited to high-flow competition setups, compound turbos, or heavily modified engines.

Q: What year 6.7 Cummins is easiest to modify?

A: Many builders consider 2013–2018 the most supported range because parts, documentation, and tuning ecosystems are mature. However, 2007.5–2009 trucks should not be described as “EGR only”; they have EGR and DPF but no later factory DEF/SCR system.

Q: Are delete kits street legal in the United States?

A: For emissions-controlled vehicles used on public roads, removing or disabling emissions equipment can violate federal, state, or local law. Delete-related parts should only be considered for legally permitted applications, and the buyer should verify current rules before purchasing or installing anything.^[1][2]

Q: Will a delete kit void my warranty?

A: It may affect warranty claims, especially if the modification is related to the failure. Dealers may also identify missing hardware or ECU flash history. If your truck is under warranty, consult your dealer and understand the risk before modifying emissions-related systems.

Conclusion

The best EGR DPF delete kit for a 6.7 Cummins is not simply the cheapest pipe or the most aggressive tune. It is the setup that matches your exact Ram model year, cab configuration, exhaust diameter, tuner support, transmission limits, and intended legal use.

For off-road, race, competition, or other legally permitted applications, a complete year-matched bundle can help reduce certain restrictions and emissions-system failure points when paired with responsible tuning. For street-driven trucks, the legal, inspection, warranty, resale, and environmental risks usually outweigh the benefits.

If you move forward, start with fitment and tuning support first. Then choose the correct 6.7 Cummins DPF delete pipe, 6.7 Cummins EGR delete kit, EZ Lynk tuner, or CCV/PCV reroute kit based on your truck’s exact configuration.

References

1. U.S. EPA — Aftermarket Defeat Devices and Tampering Are Illegal and Undermine Vehicle Emissions Controls
2. U.S. EPA — Clean Air Act Vehicle and Engine Enforcement Case Resolutions and Civil Penalty Information

John Lee

Lead Mechanical Engineer | 10+ Years Experience

John has spent the last decade engineering and testing high-performance automotive components. Specializing in diesel powertrain durability, thermal management, and fitment validation across Cummins, Powerstroke, and Duramax applications, he helps truck owners understand both performance potential and real-world risk.