2017–2023 Chevy GMC L5P & L5D Duramax 6.6L Delete Kits | Stage 1–3 HP, SOTF, EGR DPF DEF CAT Delete
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Complete your kit with these upgrades!
Add-on | Cab Chassis
Drivers' door vin stamp will say "incomplete vehicle" if you have a cab chassis truck. Cab Chassis Trucks take specialty SCR & DPF Delete pipes along with specialty EGR Delete kits. This upgrade is included if you select this option.
FLOPRO DUAL 5 INCH EXHAUST SYSTEM | 2017-2019 CHEVY/GMC L5P DURAMAX
Product Information
Product Description
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
- 8 Credits included (required for tuning)
- E41 ECM Upgrade Kit (ECM unlocked directly in-truck)
- 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
- Multi-tune or SOTF tune package (power levels selectable via steering wheel controls)
- CAN Bus Plug Kit
- 8 Credits included
- E41 ECM Upgrade Kit (in-truck unlock)
- Full EGR Delete Kit
- 4” T409 stainless steel exhaust system
- 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
- Multi-tune or SOTF tune package (steering-wheel selectable power levels)
- CAN Bus Plug Kit
- 8 Credits included
- E41 ECM Upgrade Kit (in-truck unlock)
- Full EGR Delete Kit
- 5” T409 stainless steel exhaust system
- Muffler (optional removal—note preference at checkout)
- Chrome or black exhaust tip
- T304 stainless steel downpipe (CAT delete)
- High-flow 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.
Powerlevel Options
AVAILABLE HP LEVELS
LEVEL 1 = 0HP (STOCK & HEAVY TOW)
LEVEL 2 = 50HP (LIGHT TOW)
LEVEL 3 = 80HP (LIGHT TOW & PERFORMANCE)
LEVEL 4 = 120HP (STREET & PERFORMANCE)
LEVEL 5 = 190HP (RACE) HP number is with our T-REX STAGE 3 kit.
TUNE INFO
HEAVY TOW
-No added RWHP, + 100 ft-lbs torque over factory.
-This tune is for those towing from 8,000 lbs up to max GVWR. (Gross Vehicle Weight Rating)
-Wider torque curve assists heavy loads
-Perfect tune for maximum longevity and reliability.
-Exhaust temperatures drop up to 100F under full load
LIGHT TOW
-For those towing any load up to 8,000 lbs.
+ 50 RWHP, + 200 ft-lbs torque over factory
-Designed for weekend tower, boats, small tractors, etc
-Perfect balance of sport driving & functionality
-Unhook and enjoy a sportier drive
ECONOMY/SPORT
-Fun “unloaded” daily driving
-For driving around town, highways
-Impress your friends
-Put a smile on your face
+ 80 RWHP, +300 ft-lbs torque over factory
-Puts your vehicle near the 550 RWHP mark"
HOT STREET
-Bridge between Sport Economy and Race
-A little more aggressive than Sport Economy
-Behaves nicely on the street
+ 120 RWHP, +400 ft-lbs torque over factory
-Puts your vehicle near the 580 RWHP mark.
-Race / Max Effort Tune
-Maxes out the factory Turbo.
+ 180 RWHP, + 500 ft-lbs torque over factory
-Puts your vehicle to about 600 RWHP 1360 ft-lbs.
-Up to 620 RWHP / 1380 ft. lbs with WC Fab turbo mouthpiece.
TCM TUNING RECOMMENDED FOR THIS LEVEL.
Product Compatibility
2017-2023 CHEVY / GMC DURAMAX 6.6L PICKUP AND CAB CHASSIS
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