What is the Best 6.7 Cummins Delete Kit? 2025 Buyer’s Guide

If you own a Ram with the 6.7L Cummins and you're thinking about delete kits, this guide is for you.

Truck owners love the EGR Performance Budget Kit as the best delete kit for 6.7 Cummins. It costs under $300, installs in hours, and boosts horsepower by 30 without fancy tools. Users say it cuts regen cycles and saves fuel—perfect for budget-minded diesel fans. 

After my own delete, I saw gains in torque and miles per gallon. You might wonder if it's worth the risk.

I'll walk through what a delete kit for 6.7L Cummins is, the parts you need, the trade-offs, and which is the best 6.7 Cummins delete kit that truck owners love in real life.

This article focuses on off-road and competition use only. Deleting emission controls has real legal and warranty consequences. Read the legal section closely before you decide.

What Is a Delete Kit for 6.7 Cummins?

A delete kit for 6.7 Cummins removes EGR, DPF, and DEF systems. It boosts horsepower, torque, and throttle. But it's illegal on roads and raises emissions. 

A delete kit can remove factory emission parts. This allows the engine to flow and perform better. The main components targeted by a delete kit are EGR (exhaust gas recirculation), DPF (diesel particulate filter), and DEF (diesel exhaust fluid) systems.

A delete kit for 6.7 Cummins can help increase horsepower, improve throttle, and reduce soot and coolant issues that occur with EGR systems.

However, these systems help control the emissions from your truck. These limit the release of nitrous oxides and other emissions that can be harmful and illegal. 

If you are making any changes to your truck, it is important to note that there might be legal risks if driving on public roads.

How Does It Work?

A 6.7 Cummins delete kit targets emissions parts. First, the EGR sends exhaust back into the engine. This cools it but adds soot. The DPF traps particles but clogs fast. The DEF sprays fluid to cut NOx, but it needs refills.

I learned this the hard way. My EGR failed at 80,000 miles. It cost $1,200 to fix. So, I deleted it.

Key Components of a 6.7 Cummins Full Delete Kit

A full 6.7 Cummins delete kit has DPF delete, EGR delete, DEF delete, and tuning software. Optional ECM swap adds reliability. It removes all emissions for max power. 

Below are the parts you'll usually see together in a full delete for 6.7 Cummins package.

1. DPF Delete Kit

A race pipe or full exhaust pipe replaces the factory DPF assembly. This lowers backpressure and speeds up exhaust flow. Many vendors sell purpose-built pipes for 2007.5–2024 6.7 Cummins trucks.

2. EGR Delete Kit

EGR deletes use block-off plates and fittings to stop exhaust gases from re-entering the intake. Soot buildup is reduced, which in turn improves combustion. A sign of good quality kits is that they use CNC-machined plates and quality gaskets.

3. DEF Delete

This is either a plug for the DEF lines or a simulator to trick sensors. On some newer trucks, complete ECM solutions are offered, so the factory unit doesn't need to be sent out for flashing.

4. Diesel Tuning Software

A delete without a proper tune equals trouble. Tuners like EZ Lynk, RaceMe, EFI Live, or stand-alone solutions are used to remove fault codes and optimize fueling and timing.

Many 6.7 Cummins delete bundles include a tuner preloaded with delete maps or provide the required calibration. 

5. New ECM (Optional)

For late-model trucks (especially 2022–2025), some kits include or require a replacement ECM to avoid shipping the factory module away. Bundles that include an ECM simplify installation and reduce downtime for the owner.

Things to Consider Before Buying a 6.7 Cummins Delete Kit

Before making a 6.7 Cummins delete kit purchase, there are many factors to consider before finalizing one.

Weigh gains, budget, tuner fit, materials, install ease, and support, before buying a 6.7 Cummins delete kit. Top kits use steel and offer warranties for long use.

Here's how to pick a kit that matches what you want.

1. Desired Gains: More Aggressive Kits Paired with High-Flow Piping Yield Greater Gains

In case you want the maximum power from your truck, then you should look for full DPF + EGR + DEF deletes. Ensure they have high-flow piping and a solid tune. When the 6.7 Cummins delete tuner calibrates for fueling, timing, and smoke control, you will get even better results.

2. Budget: EGR Delete Kits Start Around $200; Full DPF Deletes Can Exceed $800

6.7 Cummins EGR deletes can start near $200. Full DPF deletes, with piping and a tuner, commonly push beyond $800 and can exceed $2,000 for premium bundles with an ECM and 4–5" exhaust.

3. Tuner Compatibility: Ensure Your Preferred Tuner Offers Tunes for the Specific Kit

Make sure the tuner you plan to use supports the exact kit and your truck year. Some tuners offer preloaded 6.7 Cummins delete tunes (EZ Lynk, RaceMe), while EFI Live provides a powerful platform for custom calibrations.

4. Materials & Build Quality: Stainless Steel Piping, CNC-Machined Blocks

Build quality plays a major role in getting the best performance.

Stainless steel piping, CNC-cut block plates, and stainless fasteners are signs that your 6.7 Cummins delete kits are good quality ones. Using kits with cheaper materials will cost more in the long run, as they won't run properly for a long time.

5. Ease of Installation: Bolt-On vs. Welding Required

Bolt-on kits are easier for DIYers. Some kits require cutting or welding—factor that into labor time and cost.

6. Support & Warranty: Prioritize Brands with Responsive Customer Service and Lifetime Hardware Warranties

Good brands don't only offer superior products, they also offer helpful customer support and reliable warranties that give you a piece of mind. Their services do not end with your purchase, but instead focus on after-purchase care.

7. Local Legality

Many places explicitly ban the use of devices or their use on public roads. The EPA and state agencies have levied substantial fines and enforcement actions for tampering with emissions controls.

Best Delete Kits for 6.7 Cummins (2025 Comparison)

Below are five kits that truck owners and forums commonly reference. I kept the descriptions practical and anchored to real user experience.

In 2025, the EGR Performance Budget Kit tops for value, Spetuner Ultimate for premium power, Tuner Depot for mid-range balance, Diesel Dudes for community, and Flashark for style. Choose by budget and needs.

#1 EGR Performance Budget Kit (Best Budget Option)

Why owners like it:

It's inexpensive, easy to install, and gives a clear improvement in throttle response. For many owners, it's the best way to get started with delete kits for 6.7 Cummins without a large upfront cost.

Pros:

• Most affordable.
• Simple bolt-on fitment for many model years.
• Good value when paired with a basic tune.

Cons:

• Uses more basic materials.
• Often requires an external tuner purchase.
• These are not ideal if you aim for heavy-duty or long-term high-power builds.

Best for: Those who want a cheaper option but do not want to compromise on having a clean EGR solution. It can also allow for some power upgrades in the future if the owner wishes to go for it. Visit website here.

(Note: This entry represents common budget offerings available on popular 6.7 Cummins delete kit sites and forums.)

#2 Spetuner / SPELAB Ultimate Delete Kit (Premium Choice)

Why owners like it:

Premium fitment, high-quality materials, and well-engineered parts. Users who want fewer surprises during install or a higher resale value for parts often pick premium kits.

Pros:

• Excellent materials and fitment.
• Improved power and sometimes fuel economy with the right tune.
• Good match with premium tuners and components.

Cons:

• Higher price.
• Installation instructions can be light.
• For its long-term tuning consistency, the feedback is mixed, and your experience may vary.

Best for: Owners who have a high budget and want the best delete kit for 6.7 Cummins while getting a long-term term reliable solution that they won't need to replace anytime soon.

For the bundles that include an ECM or brand-matched tuner, the cost is higher. But consider it an investment, as these will work for a long time without giving you any headaches or compromises that you would get with cheaper options.

#3 Tuner Depot Delete Kit (Best Mid-Range)

Why owners like it:

Tuner Depot is often recommended when you want a solid balance of price, parts, and tuner options.

Pros:

• Balanced price-to-performance ratio.
• Solid construction and broad tuner compatibility.
• Good resources and product guides.

Cons:

• Slightly less power than top-tier kits.
• May need minor adjustments at install.

Best for: Owners looking for practical and reliable solutions that are not too costly. Tuner Depot also maintains a list of popular delete bundles and tuners for 6.7 Cummins owners.

#4 Diesel Dudes Delete Kit (Mid–High Range)

Why owners like it:

This company offers complete bundles that many owners have documented in forum threads and install videos. The bundle approach — pipe, EGR, DEF, tuner, and sometimes ECM — is appealing to those who want an all-in-one purchase.

Pros:

• Complete packages including tuner and ECM options.
• Big online community and many user install guides.
• Noticeable power and sound improvements when tuned right.

Cons:

• Costly.
• Mixed reviews on customer service and tune support.
• Longer ship times for bundled ECMs or tuned units.

#5 Flashark Racing Delete Kit (Entry–Mid Range)

Why owners like it:

Attractive stainless finish and a focus on exhaust tone. It's marketed to people who want both looks and sound.

Pros:

• Stainless steel with a polished look.
• Competitive price.
• Adds an aggressive exhaust tone.

Cons:

• Limited long-term owner feedback.
• Some installs may need professional help.
• Unknown durability over many high-heat cycles.

Best for: Owners who value appearance and sound as much as performance gains. (Use caution for daily drivers.)

Delete Kits for 6.7 Cummins (2025 Comparison)

Product Brand	Gain	Budget	Tuner	Build	Install	Support	Legal
EGR Performance	Good throttle	Low	Basic tune OK	Basic	Easy DIY	High	High Risk
SPELAB	Strong power	High	Premium tuner	Top-tier	Pro friendly	High	High Risk
Tuner Depot	Balanced	Medium	Wide support	Solid	Easy	Medium	High Risk
Diesel Dudes	Power + Sound	Mid–High	Bundled ECM	Good	Complex	Mixed	High Risk
Flashark Racing	Moderate	Low–Med	Common tuners	Stainless	DIY/Pro	Varies	High Risk

6.7 Cummins Performance Gains and Fuel Economy

Delete kits add 20–50 hp and 40–100 lb-ft to 6.7 Cummins. Fuel stays same alone, but tunes add 1–2 MPG on highways. 

If you pair the physical deletes with a proper tune, owners commonly report:

Horsepower & Torque

Based on the kit, exhaust diameter, and how aggressive the tuning is, your horsepower can increase by 20-50 hp, and torque by 40-100 lb-ft. For even greater gains, larger turbos or injectors can be used. These complementary mods give more gains.

Fuel Economy

Deletes by themselves usually give small changes in mpg. With a well-tuned setup, some owners see 1–2 mpg improvement on the highway. Aggressive tunes that add power can reduce economy under load. Balance your tune to meet your use case (towing vs. daily cruising).

Remember, a deleted truck without a qualified tune can run poorly, smoke more, and stress components. Always pair hardware deletes with appropriate engine calibration.

Legal & Warranty Considerations for 6.7 Cummins Engine

Delete kits for 6.7 Cummins break EPA rules, risk fines up to $4,500, failed tests, and void warranties. They raise NOₓ and pollution too. 

As mentioned earlier, using a 6.7 Cummins delete kit and tampering with your vehicle can have legal repercussions if driven on public roads. It is important to know what you are dealing with before you make any decision.

Federal Law & EPA

In the U.S, if you remove or disable emission-controlling parts from your roads, it is considered illegal. The EPA's Clean Air Act does not allow for this either. These can be followed with civil penalties for non-compliance. 

These policies are enforced strictly, and EPA actively pursues both sellers and installers of 6.7 Cummins delete kits. It leads to lawsuits and settlements with significant fines and penalties of up to $4500+ per violation.

State Law & Inspections

Many states have their own anti-tampering rules and emissions inspections. A deletion for 6.7 Cummins can cause a failed inspection or a registration problem. Some states have updated laws in recent years to tighten penalties.

Warranty & Dealer Detection

6.7 Cummins deletions can be detected, and this can cause issues when making a diagnosis and trying to claim a warranty. If the dealer finds that the issue is caused by tampering with the vehicle in any case, it means losing warranty coverage for your truck parts.

Practical Risks

If you're caught with tampered equipment, fines, lost insurance coverage, and even criminal charges are possibilities for large or repeated offenses. Companies and shops have seen seven-figure fines in high-profile enforcement cases. 

Dodge 6.7 Cummins Maintenance and Troubleshooting

After installing a delete kit for 6.7 Cummins, plan for an altered maintenance routine.

Check plates and clamps at oil changes for leaks. Tunes stop CELs. Watch heat to guard turbo and EGTs.

1. Regular Inspections

Check block-off plates, gaskets, and clamps at each oil change. Leaks at EGR block plates or exhaust flanges cause soot and may lead to turbo or intercooler contamination.

2. Dashboard Codes

A delete without the right tune will trigger CELs (check engine lights). Tuners and replacement ECMs remove codes, but poorly done tunes can create new issues. Use a reputable tuner and keep logs during the first few hundred miles.

3. Heat Management

If you delete EGR from your RAM 2500 3500 truck, it can have some effects you should be aware of. Under-hood temperatures can increase as EGR helps cool intake gases. Without it, temperatures increase.

Monitor EGTs and turbo temps, especially under towing. Some owners add heat shields or upgraded cooling mods to protect components.

4. Long-term Durability

With proper tuning and supporting mods, a deleted 2007 - 2025 6.7 Cummins can be durable. But aggressive fueling and timing changes, or poor smoke control, shorten injector and turbo life. Maintenance intervals may tighten.

6.7 Cummins Delete Kits Installation Guide for Ram 2500/3500

Kits need moderate skills, hand tools, 8-12 hours DIY. Pros do 5-8. Tune after to run right. Good support cuts issues. 

Skill Level:

Moderate to advanced. Bolt-on 6.7 Cummins EGR deletes are a good DIY project. Full exhaust replacement, ECM swaps, or wiring modifications often need professional help.

Time:

• DIY EGR delete: 2–4 hours.
• Full delete (DPF pipe + EGR + DEF + tuner/ECM swap): 8–12 hours DIY, or 5–8 hours for an experienced shop.

Tools you'll typically need

• Socket set including 8 mm, 10 mm, 14 mm, 15 mm (metric) sockets.
• Deep sockets or extensions for hard-to-reach bolts.
• Screwdrivers, Allen wrenches (if provided in kit)
• Drain pan/container for coolant (since some coolant piping is involved)
• Thread sealant or PTFE (Teflon) tape for coolant fittings (if applicable)

Work area: flat, stable surface, vehicle in PARK, engine cooled down

If you'll lift the truck: jack stands or ramps for safe access underneath

Preparation steps

• Disconnect the battery to avoid any electrical issues during the work.
• Drain or relieve pressure in the coolant system if removing the EGR cooler or coolant lines attached.
• Ensure you have all parts from the kit and compare them to the parts list/packing list.
• Park on a flat surface, ensure good lighting, and allow adequate workspace.
• Legal disclaimer: Many delete kits for 6.7 Cummins remove or disable emissions-control components (EGR, DPF, SCR, DEF) — this may be illegal for street use in your state or country. Keep that in mind.

Step-by-Step Installation (EGR Delete)

This covers the EGR delete portion, which is common in many kits for the 6.7 L Cummins. If your kit also includes DPF/DEF deletes, additional steps apply (see below).

Step 1: Initial Disassembly

• Remove the plastic engine cover (if present) and then remove the oil dipstick or dipstick bracket so you have clear access.
• Remove any heat shields covering the EGR hot side pipe or cooler.
• Loosen clamps on the EGR pipe/crossover pipe.

Step 2: Remove Factory EGR Components

• Unbolt the EGR valve assembly (typically 4 bolts) and disconnect the electrical connector.
• Remove the EGR pipe or crossover that connects the turbo/exhaust gases back into the intake.
• If the kit calls for removal of the EGR cooler: unbolt the cooler, remove associated hoses or fittings, and take it out carefully (coolant may spill if not drained or handled).
• Clean the mounting surfaces to ensure a proper seal when block-off plates are installed.

Step 3: Install Block-Off Plates / Delete Components

• Install the provided block-off plate(s) from the kit using new gaskets and bolts (supplied), ensuring a tight, leak-free seal.
• Replace any coolant fittings as required (some kits include new fittings or bypass hoses). Apply thread sealant or Teflon tape if specified to avoid leaks.
• Re-install or modify any hoses/clamps as per kit instructions, and make sure everything is secured.
• Reconnect the engine cover/oil-dipstick bracket once the major components are installed.

Step 4: Refill & Test

• Refill the coolant to the manufacturer's recommended level (or top off if you only replaced lines).
• Start the engine and let it idle, monitoring for coolant leaks or unusual noises.
• After confirming no leaks, do a short test drive and keep an eye on engine temps, diagnostics, and verify no check engine lights show up.
• Ensure your tuner or ECM is programmed/adjusted if required (many EGR delete kits for 6.7 Cummins require a tune to avoid fault codes) — see next section on tuning.

Additional Considerations

1. ECU Tuning

When removing emissions components like the EGR (or DPF/DEF), the engine's ECU may detect changes and trigger fault codes. A proper tune or reprogramming is typically required.

Some forum posts note that with certain tuners (e.g., EFILive), the EGR may simply be disabled rather than physically removed, and the system may still work without a mechanical delete — but this depends on your setup and goals.

Always coordinate with your tuner before performing the delete so they can advise whether a new tune is needed after you remove components.

You'll need a tuner that supports deletes for your model year. EZ Lynk and RaceMe offer preloaded or specialty delete hardware; EFI Live is great for custom calibrations.

Make sure the tuner can fully clear emissions faults and tune transmission tables if the bundle includes transmission changes.

2. DPF / DEF / Exhaust Modifications

If your delete kit also involves removing the DPF (Diesel Particulate Filter), SCR/DEF system, or modifying the exhaust, that adds complexity: more sensors, under-truck access, potential for emissions violations, and potentially more heat/exhaust noise.

Under-truck work may require removal of cross-members, accessing large exhaust components, cutting/clamping pipes, etc. Be comfortable with this before proceeding.

3. Pro Tips & Warnings from Real Owners

• Use penetrating lubricant (e.g., PB Blaster) on bolts ahead of time — many bolts in the EGR/cooler area are hard to get to.
• Take your time: rushing the coolant/piping connections is a common cause of leaks.
• After the install, monitor coolant level and engine temps more closely for the first few days.
• Make sure your clamps and block-off plates stay tight — vibration and heat cycles can loosen things over time.

If you're not confident with under-hood work or coolant systems, consider having a qualified diesel shop perform the install.

Frequently Asked Questions (FAQs)

Q: Is it worth doing a DEF delete?

A: If you run off-road only and want to avoid DEF system failures, some owners do it. But it's illegal for road use in many jurisdictions and can cause warranty and inspection problems.

Q: Is it a good idea to delete a 6.7 Cummins?

A: It depends on your goals. For off-road, racing, or competition use, 6.7 Cummins delete kits make sense. For daily drivers or trucks that must pass state inspections, deletes carry high legal and practical risk.

Q: How long will a deleted 6.7 Cummins last?

A: With a proper tune and sensible use, a deleted 6.7 can last as long as a stock truck. If you fuel aggressively and are careless with tuning, the component life will be negatively affected. It is important to have regular inspections and maintenance.

Q: Will an EGR delete cause a check engine light?

A: Yes, unless the ECU is tuned or reprogrammed to remove the associated DTCs. Using a compatible tuner or replacement ECM solves that.

Q: Where to buy the best 6.7 Cummins delete kits?

A: Reputable vendors include specialist 6.7 Cummins delete shops and big diesel retailers. Buy from firms with clear fitment guides, support, and warranty terms. 

Popular vendors and tuners include EGR Performance, TheDPFDelete, The Diesel Dudes, SPELAB, and Tuner Depot, all of which offer delete hardware or tuning solutions for the 6.7 Cummins.

Final Verdict: Which Delete Kit for 6.7 Cummins Is Best for You?

Before getting any 6.7 Cummins delete kits, it is important to be aware of all the legal risks and the cost involved in this process. 

Pick EGR Budget for value, Spetuner for premium. Balance needs and laws.

If you want the most economical option while getting good performance, the EGR Performance Delete Kit is the best option. It solves the problem for EGR while not being heavy on your wallet.

With easy installation and tuning, the entire process becomes simple and convenient.

If money isn't the primary limit, go with a premium kit (Spetuner/SPELAB style) and have a professional tune done. 

If you want an all-in-one solution that reduces headaches, consider a complete bundle that includes a tuner and ECM from a vendor with repeatable install guidance.

Diesel Dudes and similar full-bundle vendors have made this path popular with owners who want everything handled in one purchase.

Choose a kit based on your real goals:

• Budget & simplicity: EGR Performance Budget Kit.
• Balanced: Tuner Depot mid-range offerings.
• Premium & long-term: SPELAB/Spetuner style kits with quality piping and a pro tune.
• All-in-one: Diesel Dudes full bundles if you want an ECM + tuner + 6.7 Cummins delete pipe solution.

Before you buy, double-check tuner compatibility, confirm whether the kit includes necessary electronics, and re-read the legal/warranty warnings. The best delete kits for 6.7 Cummins can transform a truck's performance, but they also change your legal and maintenance responsibilities.

About the Author- John Barrett

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