2017-2023 6.6L Duramax L5P Parts Collection

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6.6 L5P Duramax performance parts & delete kits (2017-2023)

For 2017-2023 Chevy/GMC 6.6L L5P Duramax trucks, we offer airflow, exhaust, and calibration components built to handle towing loads and daily use. You get matched delete kits, tuners, intake upgrades, and exhaust systems for cleaner routing and lower restriction.

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 - DPF/DEF/CAT-delete exhaust sections, EGR block-off hardware, clamps, gaskets, mounting hardware, a tuner or ECM-unlock tool, and optional 2020+ unlock cables.
DPF/CAT delete pipes - stainless race pipes in 4″ diameter with correct flanges, sensor ports, brackets, and mounts for the full L5P model range.
EGR delete kits - billet block-off plates, coolant reroute fittings, stainless hardware, seals, and model-matched brackets for the 6.6L L5P layout.
L5P delete tuner & calibration tools - year-specific ECM strategies, unlock sequences, calibration files, cables, and loading tools for 2017-2023 trucks.
Exhaust system upgrades - 4″ and 5″ downpipe-back stainless assemblies with mandrel-bent sections, hangers, flanges, clamps, and hardware for emissions-off setups.

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.

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 20-40°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.