What is the Best Delete Kit for 6.7 Cummins?

6.7 Cummins engine with aftermarket delete kit installation


If you own a 6.7 Cummins diesel truck, you may be considering a delete kit to unlock better performance, fuel efficiency, and engine longevity. Emissions systems like the DPF (Diesel Particulate Filter), EGR (Exhaust Gas Recirculation), and DEF (Diesel Exhaust Fluid) can restrict power and cause long-term reliability issues. A high-quality 6.7 Cummins delete kit removes these restrictions while optimizing your engine's performance.

But with so many options available, how do you choose the best delete kit for your 6.7 Cummins? In this guide, we'll break down the top-rated kits, key features to look for, and why a proven delete solution is worth the investment.

Optimizing 6.7 Cummins Performance

Why Consider a 6.7 Cummins Delete Kit?

Deleting your 6.7 Cummins offers several benefits:

  • Increased Horsepower & Torque – Removing restrictive emissions components allows for better airflow and combustion efficiency.
  • Improved Fuel Economy – Many users report 1-3 MPG gains after a proper delete.
  • Reduced Maintenance Costs – No more clogged DPFs, failing EGR coolers, or costly DEF system repairs.
  • Longer Engine Life – Eliminating soot buildup and excessive heat from the EGR system helps preserve your engine.
  • Better Throttle Response & Smoother Performance – A tuned and deleted Cummins runs cleaner and stronger.

6.7 Cummins Deletion Benefits

Top 5 Best Delete Kits for 6.7 Cummins

1. Full EGR & DPF Delete Kit with Tuning

🔹 Best for: Complete emissions removal with performance tuning

🔹 Includes:

  • EGR delete pipe
  • DPF delete pipe (or straight pipe)
  • High-flow downpipe
  • Custom tuning (via EFI Live, H&S, or similar)

Why Choose It? A full delete with tuning ensures maximum power gains and smooth operation.

2. DPF & SCR (DEF) Delete Only Kit

🔹 Best for: Those who want to keep the EGR but eliminate DPF/DEF issues

🔹 Includes:

  • DPF delete pipe
  • SCR/DEF system bypass
  • Optional muffler or straight pipe

Why Choose It? A middle-ground option that still improves performance without a full EGR delete.

3. EGR Delete Only Kit

🔹 Best for: Reducing soot and heat without removing the DPF

🔹 Includes:

  • Block-off plates
  • Cooler bypass hose
  • EGR valve delete

Why Choose It? Helps with engine longevity while keeping emissions intact (for states with strict regulations).

4. High-Flow Downpipe & Exhaust System

🔹 Best for: Improved airflow without a full delete

🔹 Includes:

  • 4" or 5" downpipe
  • Mandrel-bent exhaust system

Why Choose It? A good upgrade for those who want better flow but aren't ready for a full delete.

5. Race-Spec Full Delete Kit with Tuning

🔹 Best for: Maximum power (600+ HP builds)

🔹 Includes:

  • Full exhaust system (no DPF/SCR)
  • EGR block-off plates
  • High-performance tuning files

Why Choose It? Ideal for competition or extreme towing applications.

Key Features to Look for in a 6.7 Cummins Delete Kit

When shopping for a Cummins delete kit, consider:

  • Material Quality – Stainless steel or aluminized steel for durability.
  • Compatibility – Ensure it fits your exact 6.7 Cummins year model.
  • Tuning Support – Some kits require custom tuning to avoid check engine lights.
  • Reputation – Buy from trusted brands with proven results.

Where to Buy the Best 6.7 Cummins Delete Kits

For high-performance Cummins delete kits, check out DynoVox Parts. They offer proven delete kits, tuning solutions, and expert support to help you get the most out of your diesel truck.

Final Thoughts

The best delete kit for your 6.7 Cummins depends on your goals—whether you want maximum power, better fuel economy, or just reduced maintenance costs. A full EGR & DPF delete with tuning is the most popular choice, but partial deletes are also effective.

Note: Deleting emissions equipment may not be legal in all areas. Check local laws before proceeding.

Upgrade your 6.7 Cummins today and experience the difference a high-quality delete kit makes! 🚛💨


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