If you own a 6.6L L5P Duramax (2017-2025), you are likely searching for the best L5P delete kit to maximize power, improve fuel economy, and boost engine reliability. A complete L5P full delete kit typically removes the DPF (Diesel Particulate Filter), DEF (Diesel Exhaust Fluid), and EGR (Exhaust Gas Recirculation) systems.
By removing these restrictions, L5P owners frequently report significant benefits like:
- Up to 150+ Horsepower Gains and increased torque with custom tuning.
- Improved Fuel Economy (2–5 MPG better) by eliminating DPF regeneration cycles.
- Enhanced Engine Reliability and lower exhaust gas temperatures (EGTs) due to reduced backpressure.
The best L5P delete kit for your truck depends on your budget, desired performance, and whether you need an all-in-one L5P bundle with tuning included. Well-regarded brands in the market include SPEtuner, SPELAB, Diesel Dudes, and Tuner Depot.
How to Choose the L5p Delete for Your Engine
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ECU requirements: Some kits are designed for basic tuners, while others require advanced tuning from a professional.
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Kit components: Kits vary; some include only the basic DPF and EGR components, while others include exhaust systems and other parts.
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Budget: Prices can range from a few hundred to several thousand dollars, depending on the kit's complexity and quality.
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Brand reputation: Some brands are more established, while others are emerging in the market.
- Year-Specific Compatibility (2017-2025 L5P Models): A common mistake is assuming all L5P models are the same. L5P Duramax models differ by ECM. 2017-2023 use the E41 ECM, compatible with most Unlock Tools, while 2024-2025 models use the E42 ECM, requiring more complex ECM service or exchange. Always check with the manufacturer for updates.
Top 10 L5P Duramax Delete Kits Comparison
| Brand Product | Main Components | Model Year | Price Range (USD) |
| 1. SPEtuner All-in-One Delete Kit | EGR/DPF/DEF Hardware, OBD2 Tuner | 2017-2023 | $2,655 - $3,699 |
| 2. SPEtuner L5P Delete Hardware Kit | EGR Delete Kit, DPF Race Pipe, Downpipe | 2017-2025 | $599 - $1,299 |
| 3. Diesel Dudes L5P Full Delete Bundle | DPF Pipe, EGR Kit, Tuning Tool, SOTF Tune | 2017-2023 | $4,499 - $5,099 |
| 4. Tuner Depot L5P All-in-One Kit | DPF/DEF/EGR Hardware, ECU Unlock Tool, SOTF Tune | 2017-2023 | $3,159 - $3,766 |
| 5. Tuner Depot EZ LYNK L5P Delete Kit | EZ LYNK Tuner, DPF/EGR Delete Pipe | 2020-2023 | $2,849 - $3,249 |
| 6. Flashark L5P All-in-One Kit | EGR/DPF/DEF Hardware, OBDii FDTI Tuner | 2017-2023 | $3,189 - $3,699 |
| 7. Flashark L5P EGR Valve Cooler Delete Kit | Billet Aluminum EGR Cooler and Valve Kit | 2017-2023 | $159 - $250 |
| 8. SPEtuner DPF/EGR Delete Kit | EGR Kit, 3.5'' Downpipe, 4"/5" Race Pipe | 2017-2023 | $699 - $1,367 |
| 9. SPELAB All-in-One DPF/EGR/DEF Kit | DPF/EGR/DEF Hardware, Tuner/Programming Sold Separately | 2017-2023 | $3,166 - $4,000 |
| 10. Sinister Diesel L5P Component Options | Down Pipe, Up-Pipes, Exhaust Tips (Hardware Only) | 2017-2025 | $20 - $250 |
Read More: Best Delete Kit for L5P Duramax 2017–2023>>>
Which L5P Kit is Right for Your Needs?
Best All-in-One Kit (Easiest to Buy)
These kits are the easiest to buy because they give you the hardware and the tuning device you need to flash the truck's computer.
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SPEtuner All-in-One Delete Kit ($2,655 - $3,699): It includes a simple, Plug-and-Play OBD2 Tuner.Includes SOTF (5-level up to +150HP) and ECM Unlock cable for 2017-2023.
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Diesel Dudes L5P Full Delete Bundle ($4,499 - $5,099): The most complete and powerful kit. It is known for including the necessary Tuning Tool and SOTF (Shift-on-the-Fly) tuning. This saves you the trouble of finding a separate tuner.
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Tuner Depot L5P All-in-One Kit ($3,159 - $3,766): A strong choice that includes the ECU Unlock Tool and tunes with high horsepower gains (up to 150 HP).
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Flashark L5P All-in-One Kit ($3,189 - $3,699): A budget-friendly way to get all the hardware plus the basic OBDii FDTI Tuner interface in one package.
For Maximum Convenience (Plug-and-Play Tuning)
These kits focus on making the tuning process simple and easy for the user.
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SPEtuner All-in-One Delete Kit ($2,655 - $3,699): It includes a simple, Plug-and-Play OBD2 Tuner. This means less time dealing with complicated computer unlocks and more time driving.
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Tuner Depot EZ LYNK L5P Delete Kit ($2,849 - $3,249): Uses the popular EZ LYNK platform. This is the best choice if you need simple remote tuning support and fast updates from a custom tuner.
Hardware Only (If You Already Have a Tuner)
If you already own an advanced tuning device (like an HP Tuner), you can save a lot of money by only buying the pipes and delete plates.
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SPEtuner L5P Delete Kit ($599 - $1,299): Hardware-only kit. Provides all the high-quality pipes and plates you need for a complete delete.Ideal for owners who already own tuning hardware.
- SPELAB DPF/EGR Delete Kit ($699 - $1,367): A great choice if you want to pick and choose your pipes. It also offers the CAN BUS Plug Kit add-on for cleaner wiring.
Best for Performance & Towing
If you need the most air flow for racing or pulling heavy loads up hills, you must choose a kit that offers a 5-inch exhaust.
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SPELAB All-in-One DPF/EGR/DEF Kit ($3,166 - $4,000): SPELAB is a top option for its robust 5-inch exhaust parts. This size reduces back pressure the most, which helps keep your EGTs (Exhaust Gas Temperatures) low during hard work.
Micro-Upgrades & Custom Builds
These items are for truck owners who just want to fix one part or build their own custom system.
- Flashark L5P EGR Valve Cooler Delete Kit ($159 - $250): The lowest-cost upgrade. Perfect if your only goal is to remove the EGR cooler to stop carbon buildup and protect your engine.
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Sinister Diesel L5P Component Options ($20 - $250): Sinister Diesel sells high-quality individual parts (like Up-Pipes and Down Pipes). This is for the skilled buyer who wants to hand-pick every part of their exhaust system.
Common Mistake When Choosing a Kit
It is easy to make mistakes when deleting your L5P. Here are the most common problems and how SPEtuner helps you avoid them:
| Common Mistakes | Why It's a Problem | How SPEtuner Helps You |
| Buying the wrong parts | Thinking all L5Ps are the same. The computer parts are different between model years (like 2017–2019 vs. 2020+). | Our kits are labeled for the exact model year of your truck. We make sure the tuning and hardware match. |
| Going cheap on materials | Low-end kits use metals that rust and break fast. | We use high-quality materials to make sure your pipes last a long time, even in bad weather and during hard use. |
| Forgetting the Tuning Tools | Installing without a tune (or the ECM Unlock Tool) leads to error codes and your truck going into Limp Mode (very slow power). | Our best-selling All-in-One Kits include the Tuning Interface and ECM Unlock Tool. You will not forget the most important part! |
Can You Install It Yourself?
Yes, you can, but it is a big job (about 4 to 8 hours).
If You Are Ready: You need basic tools and a lift or jack stands.
Our Promise: We give you Detailed Guides and How-To Videos. If you buy from us, you get the support you need to do a DIY install right.
Why Choose SPEtuner?
Choosing a delete kit for your L5P Duramax can feel tricky. You want power, but you do not want trouble. While many sellers focus only on the low price, SPEtuner focuses on giving you Peace of Mind through great service and expert engineering.
Support & Guidance: When you install these parts, you will have questions. SPEtuner offers Detailed Install Guides and a Responsive Tech Team that can help you through the tough parts, which is better than sellers who only give you basic instructions.
Precision Product Engineering: We know every model year of the L5P is slightly different. SPEtuner designs products for the best fit, using materials that will not rust quickly, which is especially important if you live where there is snow or salt.
FAQs
1. Is deleting my L5P Duramax emissions system legal?
No. Federal law (the EPA) says that removing any emissions system parts (like the DPF, EGR, or DEF) is illegal for street driving in the U.S. Delete kits are sold only for off-road, race, or competition use.
2. Do I need a tune or tuner if I install the delete hardware?
Yes, you must. If you physically remove the parts without installing a new tune, your truck's computer will cause errors and put the engine into Limp Mode (very low power). A tuner tells the computer to ignore the missing parts.
3. How much horsepower can I gain with a delete kit?
With the right parts and custom tuning, L5P owners often see gains of 100 to 150+ horsepower. Very aggressive tuning for race applications can push the engine well over 700 HP.
4. Will installing a delete kit void my factory warranty?
Most likely, yes. Since you are removing factory parts, this is a major modification. GM can refuse to cover any repair issues related to the engine or powertrain after a delete.
5. How much does a full delete kit (with tuning) cost?
A high-quality, all-in-one kit that includes the hardware, tuning, and unlock device usually costs between $3,000 and $5,000.
6. Will deleting the L5P help me save gas (MPG)?
Yes. When properly tuned, most truck owners see a gain of 2 to 4 MPG. This is because the engine stops running DPF regeneration cycles, which waste fuel.
7. How long does it take to install the kit myself?
The average DIY install takes about 4 to 8 hours of work. The time depends on your experience and whether you have a lift or jack stands.
8. What is the difference between an E41 and E42 ECM?
These are the truck's computers (ECM). The E41 is found in the 2017-2023 models, and the newer E42 is in the **2024-2025** models. The E42 is newer and can be harder to unlock for tuning.
9. What parts are included in a full delete kit?
A full kit includes the DPF delete pipe (to replace the filter), the **EGR delete components** (to stop exhaust from cycling back), a **DEF system bypass**, and the **tuner or ECM unlock tool**.
10. What makes a brand like SPEtuner stand out from cheaper options?
SPEtuner focuses on preventing the most common mistakes. They use high-quality materials that resist rust, and their All-in-One Kits include the tuner/unlock tool, so you don't forget the required tuning.
