All In One Delete Kit - Duramax 6.6 L5P, LML, LMM, LLY

Find Duramax all-in-one delete kits for Chevy Silverado and GMC Sierra 2500HD/3500HD trucks. Match your LLY, LMM, LML, or L5P by model year, included hardware, and tuner requirements.

What is a Duramax all-in-one delete kit?

Which Duramax Delete Kit Do You Need?

The right Duramax delete kit starts with your truck’s exact model year and engine platform. LLY, LMM, LML, and L5P trucks use different emissions-system layouts, exhaust parts, and tuning requirements, so fitment should always come before price or kit size.

Use the guide below to narrow your choice, then confirm the product page fitment before ordering. Some L5P hardware may cover a wider year range, while certain tuner or ECM-related options may only support specific model years.

If your truck already has aftermarket exhaust, previous tuning, or missing factory emissions hardware, check the included parts carefully before ordering. A stock truck owner may need a different package than a driver who already has tuning or exhaust work handled. For 2015.5-2016 LML and newer L5P trucks, model-year details matter more than the product title alone.

Best Duramax Delete Kit by Engine Platform

If you are comparing the best Duramax delete kit for your truck, do not shop by the words “full delete” alone. Start with the engine code, then compare the included hardware, tuner support, exhaust configuration, and install requirements.

Duramax Fitment Checklist Before Ordering

Before choosing a Duramax delete kit, confirm these details to avoid ordering parts that do not match your truck:

• Your exact model year, such as 2007.5-2010, 2011-2016, or 2017-2025.
• Your Duramax engine code: LLY, LMM, LML, or L5P.
• Whether your truck is a Chevy Silverado or GMC Sierra 2500HD/3500HD.
• Whether the package is hardware-only or includes tuner-related support.
• For L5P trucks, whether ECM unlock or model-year-specific tuning is required.
• Whether the product is intended only for off-road, racing, or closed-course use.

Duramax Delete Kits Full Overview

SPELAB offers platform-specific Duramax packages for owners who want to order the right hardware in one place instead of piecing together mismatched parts. For broader supporting upgrades, you can also browse Duramax performance parts by engine platform.

What Comes in a Duramax All-in-One Delete Kit?

A Duramax all-in-one delete kit may include several related components, but not every package contains the same parts. Some kits focus on EGR and exhaust hardware, while others add DPF, DEF, CCV reroute parts, tuner support, or ECM-related steps. Always check the product page details before purchase, especially if you are choosing between a hardware-only kit and a tuner-included package.

EGR-related hardware

Focuses on exhaust gas recirculation components and intake-side restrictions.

DPF-related exhaust parts

Focuses on exhaust-flow changes and backpressure reduction for off-road or closed-course setups.

DEF-related components

Applies mainly to later emissions-equipped platforms where SCR / DEF systems are part of the truck’s factory configuration.

CCV reroute components

Help manage crankcase ventilation routing and reduce oil vapor entering the intake path.

Tuner or ECM-related support

May be required depending on the platform, model year, and kit configuration.

Installation Instructions

Need install details before ordering? Review the 2017–2025 L5P install instructions and the factory ECM unlock instructions if your L5P setup requires them.