What Is a 6.7L Cummins Delete Kit?
A 6.7L Cummins delete kit is an emission control system removal kit for 6.7L Cummins engines (2007–2024 Dodge Ram 2500/3500/Cab&Chassis). The kit is a series of hardware components, usually including tuning software, designed to remove or bypass the original emission systems—namely, the EGR, DPF, and DEF systems.
- EGR Removal: Prevents exhaust gas recirculation, reducing carbon buildup and overheating.
- DPF Removal: Removes the diesel particulate filter, preventing forced regeneration and exhaust back pressure.
- DEF/SCR Removal : Disables urea injection, simplifying maintenance and preventing DEF system malfunctions.
In addition, a tuning software (tuner) is typically required to prevent the engine malfunction indicator lamp from illuminating or entering limp mode.
Can You Delete Without Tuning (or Tune Without Deleting)?
In short—no, both are necessary. The tuner must be used in conjunction with the removal kit. Removing the emission control system without tuning will cause the vehicle to enter limp mode, while tuning without removing the emission control system will cause emissions malfunction.
| Scenario | Result |
|---|---|
| Delete kit only (no tuner) | The ECU detects missing parts → triggers check engine light → truck enters limp mode. |
| Tuner only (no delete kit) | Slight performance boost, but emissions parts clog quickly and cause costly repairs. |
| Delete kit + tuner | Clean, efficient operation with maximum power and no warning lights. |
Is Deleting a 6.7 Cummins Worth It (2025)?
Removing the 6.7L Cummins engine remains a popular modification among off-road and racing truck owners, but whether it's "worth it" really depends on your goals.
Advantages
- Enhanced Traction and Off-Road Performance : Studies show that increased back pressure leads to increased fuel consumption and reduced thermal efficiency. Therefore, removing limiting components can improve horsepower and off-road traction.
- Fuel Cost Savings : Research indicates that fuel consumption increases during DPF regeneration ( up to approximately 13%). Removing the DPF allows the engine to run more efficiently, saving you fuel costs each month.
- Reduced Maintenance Costs : Carbon deposits in the DPF increase engine load and require frequent cleaning. Removing the DPF eliminates the need for cleaning and maintenance, significantly reducing long-term maintenance costs.
- Extended Engine Life : Removing the EGR system keeps intake air clean and reduces carbon deposits, resulting in smoother engine operation and a longer lifespan.
- Better Throttle Response: Removing the exhaust system reduces exhaust drag, eliminating throttle lag and providing faster, more stable acceleration.
Disadvantages
- Non-compliance with Road Use Regulations : In many areas, any modifications to the emissions system are prohibited from driving on public roads.
- Warranty Impact : Removing emissions components may void the original powertrain warranty.
- Resale value considerations : Many buyers prefer trucks with complete emissions systems, and some dealerships do not accept trade-ins of modified vehicles.
What to Consider When Choosing a 6.7 Cummins Delete Kit?
Choosing the right 6.7 Cummins upgrade kit depends on your truck's model year, intended use, and budget. Here are the most important factors to consider:
1. Vehicle Compatibility by Year
The ECU and exhaust system configuration differs for each generation of the 6.7-L Cummins engine. Before purchasing a kit, be sure to confirm your vehicle's model year and ensure it matches your vehicle.
Vehicle Year Compatibility:
- 2007–2009: No DEF system – Select the EGR+DPF removal kit (skip the DEF component).
- 2010–2012: First models equipped with DEF – Requires a complete EGR/DPF/DEF removal kit.
- 2013–2018: ECU update – Requires a tuner with a program specific to 2013 and later models.
- 2019–2024: Strict emission sensors – Select the kit with a "sensor bypass adapter" to avoid entering limp mode.
2. Is Tuning Required?
Yes. As explained above, the ECU must be recalibrated after removing the exhaust system.
View also : Is Tuning Required after DPF Delete
3. Materials and Durability
The two most common materials are stainless steel and aluminized steel. Choose a stainless steel exhaust kit for better durability and corrosion resistance.
4. Choose a Reputable and Reliable Vendor
Be sure to choose a reputable and tried-and-tested brand. You can evaluate products based on these aspects: reliable performance, clear installation instructions, comprehensive after-sales support, and a good return policy.
Top 3 Best Delete Kits for 6.7 Cummins (2025)
Based on the factors mentioned above when choosing a kit, we've selected three of the most popular 6.7 Cummins upgrade kits for 2025, along with their advantages and limitations.
1. SuncentAuto All-in-One 6.7 Cummins Delete Kit (2007–2024)
Positioning : High compatibility + High quality + Complete one-stop deletion solution
Advantages
- Complete materials and accessories - solves all emission systems at once.
- Wide range of compatible models, suitable for most car owners.
- Higher stability and durability for heavy-duty, trailer, or off-road use.
Disadvantages
- Higher initial cost (compared to simple or partial delete kits).
- Installation and setup requirements are relatively complex (but include installation instructions and customer support).
2. Sinister Diesel 6.7 Cummins EGR Delete Kit (2007–2018 / Partially compatible with newer versions)
Positioning : Entry-level / Partial deletion solution — Focused on EGR deletion
Advantages
- Lower cost, more accessible than a full delete kit, suitable for those with limited budgets.
- Relatively simple installation (compared to full delete), lower complexity and risk.
Disadvantages
- Partial deletion doesn't offer all the benefits of a full delete.
- Limited performance improvements, exhaust system upgrades, and maintenance improvements.
- Upgrading to a full delete in the future requires additional investment.
3. EGR Performance 6.7 Cummins Full / Partial Delete Kit (Primarily for 2013–2018 models)
Positioning : Mid-range / Full-featured / or Partial delete
Advantages
- More affordable than top-of-the-line full delete kits.
- Flexible selection based on budget and needs.
- Good compatibility for 2013–2018 models (and even some newer models).
Disadvantages
- Partial deletion results in a less than ideal performance compared to a full delete.
- Users need to manually check the tuner, which is less convenient than some integrated kits.
SuncentAuto vs Other Brands: Which Delete Kit Is Worth Buying?
Among all the brands that offer 6.7 Cummins delete kits, SuncentAuto stands out for its comprehensive coverage, high quality, and excellent service.
| Dimension | SuncentAuto | Other Brands |
|---|---|---|
| Coverage Type | All-in-One Delete Kit (EGR / DPF / DEF / CCV) | All-in-One Kit (EGR / DPF / DEF, some with CCV) |
| Compatible Model Years | 2007–2024 6.7L Cummins | Limited to specific years (e.g., 2010–2012 or 2019–2021) |
| Material | T409 stainless steel | Varies by brand (stainless or aluminized steel) |
| Includes Tuner? | ✅ | Often sold separately or requires extra setup |
| After-sales / Tech Support | ✅ Own logistics ✅ 45-day free returns ✅ Installation guide ✅ Email technical support | 14–30 day return, limited support |
| Price Range | $999–$1,299 | $1,000 - $1,500+ |
💡 Why Choose SuncentAuto?
If you find a complete all-in-one kit most suitable, SuncentAuto offers stainless steel construction, an extensive year-long warranty, and clear installation support—a practical choice for off-road users who want a complete solution without having to assemble multiple parts themselves.
New customers can also enjoy a 10% discount with the promo code 10% NEWINAUTO .
Types of Delete Kits for 6.7 Cummins (EGR / DPF / DEF / Full Delete)
When upgrading your 6.7L Cummins engine, you can choose the removal kit that suits your year, usage and budget.
1. Full Delete Kit with Custom Tuning
Includes : EGR removal pipe, DPF, DEF removal pipe, and tuner.
Ideal for: Completely removes all emission-limiting components and reprograms your ECU. Suitable for drivers seeking ultimate performance.
2. DPF + SCR (DEF) Removal Kit
Includes : DPF removal pipe, SCR/DEF bypass system, and optional muffler or straight-through pipe.
Ideal for: Users who want to reduce DPF-related issues while retaining EGR.
3. EGR Removal Kit Only
Includes : EGR removal components.
Ideal for : Users who prioritize reducing carbon buildup and lowering exhaust temperatures while still meeting emission standards.
How to Install the 6.7 Cummins Delete Kit
⚠️ Note: For off-road use only. Please check local laws before installation.
Installation Steps:
Step 1. Ensure the vehicle has no diagnostic fault codes (clear all current/historical fault codes before proceeding).
Step 2. Start the vehicle and install the tuner module.
Step 3. Remove the DPF/DEF/SCR aftertreatment hardware.
(Important Note: The emissions system must be disabled after installing the tuner to ensure proper operation.)
Step 4. Disable the EGR system components.
Step 5. Start the engine and idle for 5-10 minutes. Monitor all systems for any abnormalities. Road test conducted after verification.
Installation Precautions:
1. Prohibit high-temperature operations to prevent burns
After the vehicle is turned off, high-temperature components such as the exhaust system need to cool down sufficiently (approximately 30 minutes) before disassembly or assembly.
2. Perform rust removal beforehand
Common high-temperature components and chassis component screws are prone to rust. Necessary rust removal treatment is required before disassembly to prevent screws from jamming.
3. Wear protective equipment
For example, when performing exhaust pipe modifications that require cutting, wear safety goggles and take appropriate isolation measures to prevent accidents caused by flying sparks.
4. Environmental protection
After DIY maintenance or modification upgrades, used engine oil, coolant, etc., must be disposed of at designated recycling stations.
For detailed illustrated instructions, please visit SuncentAuto's Installation page.
Conclusion
What is the best delete kit for 6.7 Cummins? The best delete kit for a 6.7 Cummins engine should balance durability, compatibility, and cost-effectiveness. Compared to other aftermarket kit brands, SuncentAuto offers a more reliable all-in-one solution. It's made of durable stainless steel, suitable for year-round use, and offers industry-leading aftermarket support. You can explore available kits on the SuncentAuto website if you'd like to compare specifications.
