What is the L5P Duramax?
The L5P Duramax is a 6.6L turbo-diesel engine. It’s used in 2017–2023 Chevy Silverado 2500/3500 and GMC Sierra 2500/3500 trucks. Known for strong towing and reliability, this engine still has one big frustration: emissions systems. Components like the DPF, EGR, and DEF can limit performance and add maintenance headaches.
What is an L5P Delete Kit?
An L5P delete kit removes or modifies emissions parts. The goal is to unlock horsepower, improve fuel economy, and reduce repair costs. Here’s what’s inside a typical kit:
| Component | Purpose |
|---|---|
| DPF Delete Pipe | Replaces the restrictive diesel particulate filter |
| EGR Delete Kit | Blocks exhaust gas recirculation to prevent carbon buildup |
| DEF System Delete | Eliminates diesel exhaust fluid dependency |
| Tuner/Programmer | Reprograms the engine computer (ECM) for optimal performance |
Why Choose an L5P Delete
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Better Performance: Deleting restrictive emissions systems increases horsepower and torque. For example, aftermarket tuning can add over 150hp and 270 ft/lbs of torque.
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Improved Fuel Economy: Less engine strain means better mileage.
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Lower Maintenance Costs: No more clogged DPF filters or costly DEF refills.
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Longer Engine Life: Reducing soot and carbon buildup from the EGR system helps prevent engine wear.
Cost of an L5P Delete Kit
Here’s what you’ll pay for parts and labor:
| Item | Average Cost |
|---|---|
| DPF Delete Pipe | 400–400–800 |
| EGR Delete Kit | 200–200–500 |
| Tuner/Programmer | 500–500–1,200 |
| Labor | 300–300–600 |
| Total | 1,400–1,400–3,100 |
Prices vary by brand and shop rates. DIY cuts labor costs but requires mechanical skills.
Risks of Deleting Your L5P Duramax
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Illegal for Street Use: Removing emissions systems violates U.S. and Canadian laws. Fines can exceed $10,000 4.
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Voided Warranty: Dealers can deny repairs if they detect a delete.
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Resale Trouble: Many buyers avoid deleted trucks due to legal risks.
Pros vs. Cons of an L5P Delete
| Pros | Cons |
|---|---|
| +100–200+ HP gain | Illegal for on-road use |
| Better throttle response | Voided factory warranty |
| No more DPF/DEF costs | Upfront cost (1,400–1,400–3,100) |
| Improved engine longevity | Harder to sell later |
Top 5 L5P Delete Kit Brands
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Edge Products: EvoHT2 tuner unlocks ECM without removal.
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Banks Power: iDash SuperGauge monitors engine stats post-delete.
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Calibrated Power: Offers custom remote tuning.
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DuramaxTuner: Specializes in safe +150HP tunes.
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H&S Performance: Known for reliable delete hardware.
- CNRautoparts: the L5P delete kit is boast for cost effective and high quality
Alternatives to Full Deletes
If you want to stay legal:
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Emissions-Friendly Tuners: Improve power without deleting parts.
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DPF Cleaning Services: Reduce clogs without removal.
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DEF System Mods: Optimize fluid usage.
FAQ
Q: Can I undo a delete later?
A: Yes, but reinstalling emissions parts and reprogramming the ECM costs $2,000+.
Q: What’s the best tuner for daily driving?
A: Banks Power’s iDash offers real-time monitoring and mild tuning.
Q: Will deleting hurt my fuel economy?
A: No. Most users see a 2–4 MPG increase.
Final Thoughts
Deleting your L5P Duramax can turn your truck into a beast, but weigh the risks. For off-road or competition use, it’s a game-changer. For daily driving? Consider emissions-friendly tunes instead. Always research local laws and talk to trusted mechanics before starting your build. Ready to unleash your Duramax? Grab a cold one, get your tools, and let’s wrench!
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