Top 5 Diesel Performance Mods for GMC Sierra & Silverado L5P Trucks

If you drive a 2017–2023 GMC Sierra or Chevy Silverado with the 6.6L Duramax L5P engine you already know it’s built for work and built to last. But with the right upgrades, your truck can run stronger, sound better and perform like a whole new machine.

These are the top 5 diesel performance mods that L5P owners across the United States trust to boost horsepower, improve towing and make their trucks more reliable.

1. All-In-One L5P DPF/DEF/EGR Delete Kit (2017–2023)

This upgrade takes off the factory diesel particulate filter (DPF), diesel exhaust fluid (DEF) system and exhaust gas recirculation (EGR) components. The result? A truck that breathes better, runs cooler and makes more power.

Red Duramax L5p diesel truck with egr delete parts parts and Tuner Depot boxes on a white background

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Why L5P owners choose it:

  • Better towing power for long hauls across the interstate.
  • Improved fuel mileage on cross-country trips.
  • Fewer breakdowns and costly emissions-related repairs.

2. Cat & DPF Delete Pipe for L5P Engines (2017–2023)

The Cat & DPF Delete Pipe replaces the restrictive catalytic converter and DPF with a straight-through pipe for free-flowing exhaust.

BUY L5P CAT DELETE PIPE

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Key benefits:

  • Faster turbo spool-up for stronger acceleration.
  • More pulling power when hauling heavy loads.
  • Works great with a performance tune for even bigger gains.

3. Down-Pipe Back Race Exhaust System (2017–2023)

The factory exhaust holds your L5P back. A down-pipe back race exhaust increases exhaust flow, drops exhaust temps, and gives your truck the aggressive sound diesel owners love.

Black Bandit Race Exhaust 4-inch / No Muffler GM Duramax L5P - Down-pipe Back Race Exhaust System (2017-2023)

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Why it’s popular nationwide:

  • Deep, powerful tone without excessive drone.
  • Lower EGTs when towing up mountain grades or running heavy.
  • Built from stainless steel for all-weather durability.

4. EGR & Cooler Delete Kit (2017–2023)

An EGR delete keeps soot out of your intake system, improves cooling, and helps your L5P run cleaner and longer.

Tuner Depot All-in-one Kit GM Duramax L5P – All-In-One DPF/DEF/EGR Delete Kit (2017-2023)

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Why it matters:

  • Less carbon buildup for smoother performance.
  • Reduced risk of overheating during demanding jobs.
  • Ideal for trucks used in heavy-duty work or high-mileage driving.

5. Switch-On-The-Fly (SOTF) Tune Package (2017–2023)

With an SOTF tune, you can change your truck’s power level while driving — no need to reflash every time. Switch between economy mode, towing mode, and full power with just a click.

Tuner Depot GM Duramax L5P – SOTF Tune Package (2017-2023)

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Benefits for US diesel owners:

  • Flexibility for different driving conditions from flat highways to steep mountain passes.
  • Perfect for work trucks, weekend toys and daily drivers alike.
  • Works in combination with exhaust and delete kits for maximum gains.

Why Buy From TunerDepot

  • Specialized in L5P Duramax trucks — We know what works and what lasts.
  • Nationwide Shipping — Get the parts you need anywhere in the USA.
  • Expert Support — Our team helps you choose the right mods for your driving style.

Upgrade Your L5P Today

Whether you’re in Texas, Montana, Florida or anywhere in between, these top diesel performance mods will help your GMC Sierra or Chevy Silverado L5P run harder, tow stronger and sound better.

📞 Call 833-304-4400 or order now at tunerdepot.com — we ship nationwide!

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