Why Consider a Delete Kit for Your L5P Duramax?
What Is a Delete Kit?
If you’re driving a 2017–2023 L5P Duramax, you’ve probably heard the term “delete kit” thrown around by other diesel owners or tuners. But what exactly is it?
A diesel delete kit is a bundle of components designed to remove emissions control systems like the DPF (Diesel Particulate Filter), EGR (Exhaust Gas Recirculation), and DEF (Diesel Exhaust Fluid) system from your truck. These systems were added to meet environmental regulations, but often come at the cost of performance, fuel efficiency, and long-term engine health.
Most full delete kits include:
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DPF delete pipe (replaces the restrictive factory exhaust)
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EGR block-off or full delete components
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DEF system removal or bypass
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A tuner or ECM calibration device to prevent error codes and enable performance tuning
Simply put, a delete kit lets your Duramax “breathe” more freely, eliminating restrictions that factory emissions equipment imposes on your engine.
Benefits of Deleting (Performance, Reliability, MPG)
Let’s be real—most L5P owners aren’t deleting their trucks just for the fun of it. The reason is simple: performance. A full delete opens up your Duramax, giving it the airflow and combustion freedom it was meant to have before emissions gear choked it down.
Here’s what you can expect:
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More Power: Removing DPF, EGR, and DEF systems allows your engine to produce more horsepower and torque. Many users report gains of 100 HP or more with proper tuning.
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Better Fuel Economy: Say goodbye to forced regens and clogged filters. Without the DPF, your truck isn’t dumping diesel to burn soot, which means noticeable gains in MPG—often 2–4 mpg better.
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Lower Engine Temps: EGR systems recirculate hot exhaust gas into the intake. Once deleted, your engine breathes cooler, leading to lower EGTs (exhaust gas temps).
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Fewer Maintenance Headaches: No more DEF refills. No more check engine lights due to sensor failures or clogged filters.
Legal Disclaimer & Off-Road Use Only
Under current EPA regulations in the U.S. and Canada, removing emissions equipment on a diesel truck that is used on public roads is technically illegal. The only legal exception is if the truck is used exclusively for off-road purposes.
That’s why all reputable sellers, including SPETUNER, clearly state: “Our delete kits are for off-road use only.”
If your truck still needs to pass emissions inspections, deleting it could put you in violation of federal or provincial laws. Fines can be significant.
We don’t encourage breaking regulations. We’re here to educate and supply equipment intended for legitimate off-road use only.
Best Delete Kits for L5P Duramax: Top 3 Picks
Best L5P Duramax Delete Kits Comparison Table
| Feature | SPETUNER | Tuner Depot | The Diesel Dudes |
|---|---|---|---|
| Price Range | ~$3,699 | ~$3,258–$3,572 | ~$4,499–$5,099 |
| Delete Coverage | DPF, EGR, DEF | DPF, EGR, DEF | DPF, EGR, DEF |
| Tuning Included | Yes (Plug-and-Play OBD2 Tuner) | Yes (Flash Tuner + Unlock Cable) | Yes (CAN Plug + SOTF Tuner) |
| Shift-On-The-Fly (SOTF) | Yes | Yes | Yes |
| Exhaust Option | 4" stainless (included) | 4"/5" optional upgrade | 5" exhaust (muffler or straight pipe option) |
| Build Material | Stainless steel, OEM-style fitment | Stainless steel with welded hangers | Heavy-duty stainless with variants |
| Tech Support | Excellent with install guides & videos | Moderate (basic documentation) | Good online product info |
| Ideal For | Quality-focused buyers needing support | Budget-conscious DIYers | Power users wanting the full package + tuning |
Product Comparison Table: Features & Pricing
| Specification | SPETUNER | Tuner Depot | The Diesel Dudes |
|---|---|---|---|
| Total Price Range | ~$3,699 | ~$3,258–$3,572 | ~$4,499–$5,099 |
| Model Year Coverage | 2017–2023 L5P | 2017–2023 L5P | 2017–2022 L5P |
| Included Components | DPF, EGR, DEF delete + tuner | Same | Same + optional 5" exhaust |
| Tuner Features | Plug-and-play pre-configured | Flash device, tuning credits | CAN plug, SOTF, performance tunes |
| Exhaust Material | Polished stainless steel | Raw stainless (upgradeable) | Premium-grade stainless |
| Custom Tuning Support | Yes | Yes | Yes |
| Installation Difficulty | Moderate (well-supported) | Moderate to hard | Moderate (with variants) |
| Customer Support | High-touch diesel experts | Basic online support | Product-centric help |
Which Kit Is Right for You?
For Budget-Conscious Buyers
Choose Tuner Depot if:
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You’re comfortable with DIY
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You want tuning + delete, but don’t need hand-holding
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You want flexibility in exhaust choices
For Maximum Performance & Features
Choose Diesel Dudes if:
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You want the biggest gains
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You’re OK with a higher budget
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You need everything in one package
For Full Plug-and-Play Convenience
Choose SPETUNER if:
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You want OEM-quality parts
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You appreciate installation support
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You prefer a trouble-free setup
SPETUNER vs Competitors: What Stands Out
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Support & Guidance
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Precision Product Engineering
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Peace of Mind Service Experience
Common Mistakes When Choosing a Delete Kit for L5P Duramax
1. Thinking All L5Ps Are the Same
Each model year may require different components or ECM tools.
2. Going Cheap on Materials
Low-end kits may use mild steel that rusts quickly, especially in northern climates.
3. Forgetting the ECM Unlock Tool
You may not be able to flash tunes without the right unlock device.
4. Installing Without a Tune
Physical delete without reprogramming leads to limp mode and errors.
Still Not Sure? Here’s What to Ask Before You Buy
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Does the kit include tuning and ECM unlock?
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Is it compatible with my truck's exact model year?
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Can I install it with the tools I have?
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What support does the seller provide after the purchase?
Installation & Difficulty Level
Can You Install It Yourself?
Yes, with experience and the right tools. No, if you’ve never worked on exhaust or tuning systems.
Tools Required & Time Estimate
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Basic socket set, torque wrench
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Flash tuner or laptop
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Lift or jack stands
Install time: 4–8 hours, depending on setup.
DIY vs Professional Installation
DIY is doable with guidance. SPETUNER provides excellent documentation.
SPETUNER Support Resources
Detailed install guides, responsive tech team, and video walk-throughs.
Conclusion: Our Final Recommendation
For the best all-around quality and support: Choose SPETUNER.
For budget builds, Tuner Depot is a solid, customizable option.
For max output and complete solutions, the Diesel Dudes deliver it all.
Ready to upgrade your Duramax?
👉 Shop SPETUNER Delete Kit Now
Frequently Asked Questions about the L5P Duramax Delete Kit
What do I need to delete my L5P Duramax?
To fully delete your L5P Duramax, you need a DPF delete pipe, EGR delete kit, DEF system bypass components, and a compatible tuner or ECM flashing device—ideally with an unlock cable for 2017+ models.
Is deleting your L5P worth it?
Yes, for off-road use, deleting can offer major gains in horsepower, fuel economy, and reliability. Many owners report smoother towing, better throttle response, and fewer regen or sensor issues.
How much does it cost to delete an L5P Duramax?
Depending on the brand and setup, a full delete kit for L5P Duramax ranges from $3,200 to $5,000. This typically includes all hardware and a tuner with shift-on-the-fly features.
Who makes the best tunes for L5P Duramax delete?
SPETUNER is widely trusted for delivering pre-configured, high-performance tunes optimized for deleted L5Ps. Their support and reliability make them a top choice among diesel enthusiasts.
What do you unplug when deleting an L5P?
During a full delete, components such as DEF sensors, EGT sensors, and EGR connectors are unplugged or bypassed. Tuning ensures the ECM ignores these signals without triggering error codes.
Is it illegal to delete a diesel truck in 2025?
Yes, deleting emissions systems on a street-driven truck remains illegal under EPA regulations in 2025. Delete kits are legally sold for off-road use only.
Can I install an L5P delete kit myself?
With mechanical experience, the right tools, and a lift or jack stands, yes. Expect 4–8 hours of work. SPETUNER provides detailed instructions that make DIY installs more manageable.
Will a delete kit void my Duramax warranty?
Most likely. Any emissions system removal can void your powertrain warranty. It’s recommended to wait until your warranty expires or use the kit on off-road vehicles only.
Will deleting improve my towing performance?
Definitely. Deleting your L5P improves exhaust flow and torque output. Paired with the right tune, you’ll get better pulling power and lower EGTs under load.
Which delete kit offers the best support?
SPETUNER stands out for their customer support, OEM-like fitment, and install documentation. For first-time installers or DIYers, their guidance can be a game changer.
