2017–2023 Chevy GMC L5P AND L5D Duramax 6.6L Delete Kits | Stage 1–3 | EGR DPF DEF CAT Delete

2017–2023 Chevy / GMC L5P & L5D Duramax 6.6L

2500, 3500, 4500 & 5500 Pickup and Cab Chassis
Dyno-Tested Stage 1, Stage 2 & Stage 3 Delete Kits

Built on the dyno, refined under load, and proven on the street—these delete kits are engineered to eliminate factory restrictions and unlock the true performance potential of your L5P/L5D Duramax. Each stage is designed to scale with your goals, from reliable daily power to full dyno-dominating performance.

STAGE 1 | THE TRICERATOPS

Beginner Full Delete Kit – Dyno-Verified Foundations

The Triceratops is your entry into real diesel performance. On the dyno, this stage removes the three major factory restrictions—DPF, DEF, EGR, and CAT—creating a clean, reliable baseline with zero unnecessary extras. Ideal for owners who want a proper delete setup without stepping into multi-tune complexity.

Stage 1 Includes:

• OBD-II Flash Delete Tuning Interface
• Single delete tune (customer-selected)
• CAN Bus Plug Kit
• Credits included (required for tuning)
  
• HP tuners ECM unlock kit
• EGR unplug.  
• T409 stainless steel DPF delete pipes

Best for: Daily drivers, work trucks, and owners wanting a clean dyno baseline with proven reliability.

STAGE 2 | THE VELOCIRAPTOR

Value Delete Kit – Power Meets Control

The Velociraptor is where dyno data meets real-world versatility. This kit adds multi-level or Shift-On-The-Fly (SOTF) tuning and upgraded exhaust hardware, delivering measurable power gains, smoother throttle response, and enhanced drivability—all without sacrificing reliability.

Stage 2 Includes:

• OBD-II Flash Delete Tuning Interface
• SOTF power levels (Switch on the fly via cruise control buttons) SINGLE tune for L5D trucks. 
• CAN Bus Plug Kit
• Credits included
  
• HP tuners ECM unlock kit
• Full EGR Delete Kit
• 4” T409 stainless steel exhaust system (2020+ Cab chassis receives delete pipes)
• Black or chrome T304 stainless steel exhaust tip
• T304 stainless steel downpipe (CAT delete integrated into factory downpipe)

Best for: Owners wanting tunable power, dyno-backed performance, and long-term reliability.

STAGE 3 | THE T-REX

Ultimate Delete Kit – Full Dyno Domination

The T-REX is the apex predator. Developed for maximum airflow, maximum fueling control, and maximum dyno output, this kit transforms your L5P/L5D into a no-compromise diesel performance machine. Everything in this package is selected to support aggressive tuning and sustained power under load.

Stage 3 Includes:

• OBD-II Flash Delete Tuning Interface
• SOTF power levels (Switch on the fly via cruise control buttons) SINGLE tune for L5D trucks.
• CAN Bus Plug Kit
• Credits included
  
• HP tuners ECM unlock kit
• Full EGR Delete Kit
• 4” T409 stainless steel exhaust system (2020+ Cab chassis receives delete pipes)
• Muffler (optional removal—note preference at checkout)
• Chrome or black exhaust tip
• T304 stainless steel downpipe (CAT delete)
• High-flow S&B cold air intake

Best for: Performance-focused builds, aggressive tuning, and maximum dyno numbers.

Important Tuning Information

• This is a custom tuning package and all sales are final
• Tune order form must be completed to receive custom tuning
• Tune delivery time: 3–5 business days
• Login credentials will be emailed after form submission
• Tunes are downloaded directly from the tuning portal

Why Choose Dyno-Built Delete Kits?

• Dyno-validated tuning strategies
• In-truck ECM unlock (no bench flashing)
• Stainless steel exhaust and airflow components
• Scalable stages to match your build goals
• Designed specifically for L5P & L5D Duramax platforms

If you want a delete kit that’s engineered—not guessed—this lineup delivers proven results from the dyno to the driver’s seat.