2017-2023 6.6L Duramax L5P Parts Collection
- Featured
- Most relevant
- Best selling
- Alphabetically, A-Z
- Alphabetically, Z-A
- Price, low to high
- Price, high to low
- Date, old to new
- Date, new to old
6.6 L5P Duramax performance parts & delete kits (2017-2023)
For 2017-2023 Chevy Silverado and GMC Sierra 2500HD/3500HD pickup owners running the 6.6L L5P Duramax, we offer airflow, exhaust, and calibration components built to handle towing loads and daily use. You get matched delete kits, ECU unlock tools, SOTF tune packages, intake upgrades, and exhaust systems for cleaner routing and lower restriction.
|
Feature |
2017β2019 |
2020β2023 |
|
Engine Version |
6.6L Duramax L5P |
|
|
Supported Models |
Silverado/Sierra 2500HD/3500HD Pickup |
|
|
Tuner Options |
ECU Unlock Tool |
|
|
Unlock / ECM |
ECM unlock required.Β ECU Unlock Tool: Stock file, infolog & vehicle data required. |
|
|
SOTF Support |
SOTF available: ECU Unlock ToolΒ Β |
|
|
EGR Delete Kit |
Available in Full Delete Kits or as a standalone kit |
|
|
Exhaust Options |
Delete pipe, 4" or 5" exhaust system, Muffler / No Muffler, 3.5" downpipe |
|
|
Air/Fuel Upgrades |
S&B intake, FASS fuel system |
|
What's included in the GM Duramax L5P delete kit collection
Our collection covers everything you need to remove the DPF, DEF, and EGR systems on 2017-2023 6.6 Duramax L5P trucks.
-
Full delete kits - separate bundles for 2017-2019 and 2020-2023 (different ECU/TCM and Allison transmission variants). Each ships with a DPF/CAT delete pipe, EGR delete kit with block-off plate, ECU Unlock Tool, CAN Communication Plug Kit, and your choice of exhaust (4β³ or 5β³ Downpipe Back exhaust, straight or with muffler). SOTF support with multiple power levels included.
-
DPF/CAT delete pipe - 4β³ stainless steel race pipe with welded sensor bungs, reinforced flanges, brackets, and hangers. Available straight or with muffler. Standalone product - not paired with a full L5P exhaust system. Fits 2017-2025 L5P.
-
EGR delete kit - block-off plate, EGR delete pipes, coolant reroute fittings, stainless hardware, and seals. Single kit fits 2017-2025 L5P, available standalone or as part of a full delete kit.
-
ECU Unlock Tools & TCM Unlock Tools - tuning is done via an ECU Unlock Tool (separate versions for 2017-2019 and 2020-2023) with flash calibration and SOTF support. Standalone SOTF Tune Packages also available for owners who already have the unlock tool. Unlocked TCMs sold separately: T87A for 2017-2019 (Allison 6-speed) and T93 for 2020-2023 (Allison 10-speed)
-
Exhaust system upgrades - 4β³ and 5β³ Downpipe Back exhaust mandrel-bent stainless steel exhaust systems, straight pipe or with muffler. All bolts, clamps, and hangers included. A separate 3.5β³ Downpipe is also available as a standalone upgrade.
-
Performance parts - S&B Cold Air Intake for improved airflow and turbo response, and FASS Titanium Signature Fuel System for consistent fuel delivery under tow and high-flow demand.
Why choose Dieselino for your Duramax upgrades
Dieselino gives long-term value through durable materials, verified fitment, and reliable support for every 2017-2023 L5P build.
-
Components tested on real L5P workloads to guarantee predictable performance in heavy-duty scenarios.
-
Stainless hardware and TIG-welded assemblies built to handle extreme temperature and vibration cycles.
-
Model-matched calibration guidance for stable tuning across all 2017-2023 ECM variants.
-
Fast order processing with clear tracking and secure packaging for large exhaust components.
- Direct support for installation questions, warranty cases, and configuration-specific upgrade paths.
FAQs
The best option is a full bundle that pairs hardware with proper tuning. Owners typically choose kits that include:
- Downpipe-back exhaust systems.
- EGR delete hardware matched to the 6.6L L5P.
- A tuner with L5P-specific files.
This combination ensures consistent airflow and stable ECM behavior.
Note: all diesel delete parts are intended for off-road use only. Always check local laws.Β
Pricing varies by configuration:
- Full 6.6 Duramax delete kits: from $3,488.
- Performance race or delete pipes: from $385.
- Tuners: from $1,367.
Prices change over time, so owners should confirm current totals before ordering.
Yes. A 6.6L L5P cannot run correctly without disabling DPF/DEF/EGR routines and updating fuel maps. A tuner or unlock-and-flash tool is mandatory for all 2017, 2018, 2019, 2020, 2021, 2022, 2023 trucks to maintain proper turbo behavior and throttle logic.
Removing the EGR system eliminates the recirculation path, keeps soot out of the intake, and drops intake temps under towing by 20-40Β°F. On most L5P setups, owners typically see 10-25 HP added from cleaner airflow and more stable boost, and up to 150 HP with aggressive race tuning. Heavy-load trucks also show more consistent EGT control.
Installation difficulty depends on the shop tools and workspace. A standard DPF/DEF/CAT-delete exhaust can take several hours because of the large factory system. After hardware installation, tuning must be applied. Most installs follow this order:
- Load the L5P delete tuning.
- Remove OEM emissions components.
- Install race exhaust and clamps.
- Add EGR delete hardware.