Full Delete Kit (DPF/DEF/EGR) | GM/Chevy Duramax 6.6L LML | 2015.5-2016

Description

What’s Included

The All-in-One bundle combines the tuner, exhaust, EGR components, and required hardware into one complete package for the late LML platform.

Vehicle Compatibility

This LML delete kit is designed for:

• Years: 2015.5, 2016
• Make: Chevrolet / GMC
• Models: Silverado 2500HD, Silverado 3500HD, Sierra 2500HD, Sierra 3500HD
• Engine: 6.6L Duramax LML diesel
• Body style: Pickup
• Exhaust connection: 3-bolt flange
• Application: Off-road and competition use

The package is engineered specifically for late-production LML trucks. Early 2015 models use a different exhaust connection, so the 2015.5 production split is important for correct fitment.

How work?

The 2015.5-2016 6.6 Duramax LML delete kit combines mechanical emissions removal with matching ECM tuning. The selected exhaust configuration removes the restrictive DPF, CAT, and DEF/SCR aftertreatment section, while the EGR hardware eliminates exhaust-gas recirculation through the cooler and intake. Mini Maxx V2 changes the required engine and emissions strategies so the truck can operate with the selected components removed. Reduced exhaust restriction can improve throttle response, airflow, and overall engine performance.

Features

The package is designed around the late LML 3-bolt exhaust connection and provides three exhaust choices instead of forcing one configuration. Owners can keep more of the factory exhaust with a Delete Pipe or upgrade to a larger 4-inch or 5-inch system.

Mini Maxx V2 is preloaded, so separate custom tune files are not required. The tuner also provides live engine monitoring and supported diagnostic functions. Power changes are made through the programming menu; the LML configuration does not use true Switch-On-The-Fly tuning.

The package focuses on DPF, DEF/SCR, EGR, and exhaust removal, while normal CCV and engine maintenance remain part of regular truck service.

Tuning & Settings

The LML Duramax delete kit includes four Mini Maxx V2 engine settings:

Changing between power levels requires reflashing through the tuner rather than switching levels while driving.

Actual efficiency, boost response, fuel consumption, and performance depend on tune selection, engine condition, tires, load, and driving style.

Optional Add-Ons

• DPF Delete Pipe – replaces the restrictive factory filter and CAT section while retaining more of the original exhaust.
• 4-Inch Exhaust System – T409 stainless steel Downpipe-Back option with strong flow and practical sound levels.
• 5-Inch Exhaust System – larger-diameter upgrade with a deeper exhaust tone.
• No Muffler – provides a louder, more aggressive sound.
• With Muffler – reduces overall exhaust volume and highway drone.
• 2-Inch High-Flow Up-Pipe – optional performance upgrade for improved flow through the corresponding exhaust section.

Key Benefits

Up to +100 HP – four Mini Maxx V2 calibrations provide stock, towing, street, and performance choices.

Configurable Exhaust – choose a Delete Pipe, 4-inch system, or 5-inch system with or without a muffler.

Reduced Exhaust Restriction – deleting the factory particulate and aftertreatment components creates a freer-flowing path.

Cleaner Intake – EGR cooler and valve removal reduces soot returning to the engine intake.

Complete Late-LML Package – the LML full delete kit combines compatible tuning and hardware for 2015.5 and 2016 pickup models.

Installation Information

Installation instructions are provided with the package. Owners with basic-to-intermediate mechanical skills can complete the installation using metric sockets and wrenches, ratchets and extensions, a torque wrench, penetrating oil, an exhaust sensor socket, and safe lifting equipment.

A tuner plus Delete Pipe installation normally takes approximately 2-3 hours. A complete exhaust and EGR removal generally takes approximately 3-5 hours, with additional time possible for seized factory hardware or limited cooler access.

Mini Maxx V2 connects through the OBD-II port. Initial programming generally takes around 20-30 minutes. Stable battery voltage should be maintained during flashing, and the programming process should not be interrupted.

No More Emissions Codes

Correct Mini Maxx V2 programming prevents supported warnings, regeneration requests, limp mode, and derate conditions caused by the removed emissions components. Normal diagnostics for unrelated engine, fuel, turbo, transmission, wiring, and sensor failures remain active.

Common applicable code families include:

• DPF: P2002, P242F, P2452, P2453, P2458, P2459, P2463, P246C
• EGR: P0401, P0402, P0403, P0404, P0405, P0406, P2457
• DEF/SCR: P203B, P204F, P205B, P207F, P208A, P20B9, P20BA, P20EE, P229F

Exact DTC coverage depends on the ECM strategy and installed tune.