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Please Note

• All tunes are custom and non-refundable under ANY circumstances.
• EZ LYNK tuning files require 7–10 business days to create. DO NOT install delete parts early.
• You may be charged import fees. Please accept the delivery and contact us at [email protected] to resolve any charges. Thanks!
• Does not fit Cab & Chassis trucks.

Unlock the true potential of your 2011-2016 GM 6.6L Duramax LML. This package combines a T409 DPF Delete Pipe, EGR Delete Kit, and EZ Lynk tuner (with device and SOTF tunes) to address common factory limitations and enhance performance. Already have a tuner? Check out our LML Delete Kit (No Tuner) for the hardware only.

LML All-in-One Delete Kit (with soft tuning) Key Features

• Eliminates DPF & EGR Issues - Removes the factory DPF, preventing forced regenerations and engine power limiting. Deletes the EGR system to lower engine temperatures and reduce intake carbon buildup, promoting long-term reliability.
• Customizable On-Demand Power - The EZ Lynk device with SOTF tunes allows you to switch power levels instantly (e.g., Economy, Tow, Performance) for better drivability, fuel efficiency, and significant horsepower gains.
• Overall Performance Gains - Delivers stronger throttle response, lower exhaust temperatures, and a more robust sound. Reduces vehicle weight and eliminates the future cost of DPF/EGR system repairs.

Specification

Exhaust Material	T-409 Stainless Steel, it is magnetic.
Thickness	2mm thick for long-lasting durability and heat resistance.
Inlet Diameter	4.0"/5.0‘’
mandrel-bent construction	Maximum flow efficiency, helping your diesel breathe easier

 

EZ Lynk Key Features

How the EZ LYNK Duramax Package Works

The Auto Agent 3 connects to your truck’s OBD2 port and links with the EZ LYNK app, giving your technician direct access for updates, troubleshooting and tune delivery via Wi-Fi. NOTE: Tuning does not support PTO units.

60-Second Simple Setup:

• Plug the device into your Duramax OBD2 port.
• Install the EZ LYNK Mobile App on Android or iOS.
• Connect via Wi-Fi, and you're all set for Cloud-based vehicle tuning.

Advanced Diagnostic Scan Tool:

• Connected OBD scan tool for you and your technician.
  
• Read and clear Diagnostic Trouble Codes (DTC).
• Perform recommended functions and install firmware updates over the air.

Cloud-Connected Tune Management:

• Access and install tune files directly through the EZ LYNK cloud interface.
• Switch between power levels or towing calibrations anytime, anywhere.
• Automatic data sync ensures VIN-locked tuning integrity and reliability.

Fleet-Ready Functionality:

• Ideal for both single-truck owners and fleet managers.
• Share data logs, maintenance reports, and diagnostics remotely.
• Enable multiple user access for simplified management and communication.

Platform Compatibility:

• Web Portal: Access and manage tunes from any browser.
• EZ LYNK App: iOS 12.0+ and Android 8.0+ compatible for wireless management.

Installation

 6.6L Duramax LML EGR Delete Kit Instruction

 2011-2016 LML 6.6L Duramax DPF Delete Instruction

 EZ Lynk Installation Instruction

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How to Choose DPF Delete?

4” vs 5” Straight Pipe Comparison

When choosing a LML 6.6L Duramx delete pipe, the most common options are 4-inch and 5-inch straight pipes.
The 4-inch straight pipe delivers a tighter, raspier exhaust note—especially noticeable at lower RPMs—making it ideal for daily driving or mildly tuned setups where excessive drone is undesirable.
In contrast, the 5 inch straight pipe LML 6.6L Duramx offers a deeper, more refined tone with less high-pitch resonance. It excels in high-output builds and towing scenarios, where increased exhaust flow is beneficial.

Driver feedback suggests:

• 4”straight pipe is great for stock-to-lightly-modded trucks and a quieter cabin

• 5” straight pipe is perfect for aggressive builds, deeper tone lovers, or anyone maximizing exhaust performance

Different Types of DPF Delete

DPF Race Delete

• Only removes the DPF (keeps stock downpipe)
• Minimal performance gain but cheapest option
• Best for budget-focused or emissions-testing avoidance

Downpipe-Back Delete

• Replaces exhaust from the turbo downpipe backward
• Improves mid-range power and throttle response
• Good for street builds keeping stock turbo

Turbo Back Delete

• Full system replacement from turbo outlet
• Includes high-flow downpipe for maximum efficiency
• Reduces turbo lag and boosts top-end power
• Top choice for tuned/high-performance engines

Dual Exit (5" only)

• Splits into dual exhaust paths
• Enhances cooling and flow for extreme applications
• Used in heavy towing or competition setups

Muffler vs. No Muffler

With Muffler

• Tames exhaust noise for daily driving
• Slight power restriction (~5-10HP)
• More likely to comply with local noise laws

Straight Pipe (No Muffler)

• Loud, aggressive exhaust note
• Unrestricted flow for max horsepower
• Often illegal for street use (noise/emissions)
• Reserved for off-road/race applications

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Fitment

• 2011 Chevy Silverado 2500HD / 3500HD & GMC Sierra 2500HD / 3500HD
• 2012 Chevy Silverado 2500HD / 3500HD & GMC Sierra 2500HD / 3500HD
• 2013 Chevy Silverado 2500HD / 3500HD & GMC Sierra 2500HD / 3500HD
• 2014 Chevy Silverado 2500HD / 3500HD & GMC Sierra 2500HD / 3500HD
• 2015 Chevy Silverado 2500HD / 3500HD & GMC Sierra 2500HD / 3500HD
• 2015.5 Chevy Silverado 2500HD / 3500HD & GMC Sierra 2500HD / 3500HD
• 2016 Chevy Silverado 2500HD / 3500HD & GMC Sierra 2500HD / 3500HD
• Does not fit Cab & Chassis trucks.

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