True North Turbos 63.5mm VGT Turbo | 2011-2016 6.6L LML Duramax | 700 WHP

The True North Turbos 63.5mm VGT Turbo for the 2011-2016 6.6L LML Duramax is built for truck owners who want serious airflow, strong towing performance, lower EGT potential, and up to 700 wheel horsepower with the right supporting modifications.

Designed as a direct-fit upgraded VGT turbocharger, this TNT Duramax turbo keeps the responsive street manners and variable vane control that make the factory-style platform so effective, while increasing airflow capacity for higher power builds.

Whether you're building a daily-driven tow rig, street truck, or weekend performance Duramax, this turbocharger delivers the balance of spool-up, airflow, and reliability that LML owners need.

Why Upgrade the Factory LML Duramax Turbo?

The factory LML turbocharger works well on a stock truck, but as fueling, tuning, and boost increase, the stock charger can quickly become a restriction. Higher drive pressure and elevated EGTs can limit performance, especially when towing or pushing for higher horsepower.

The TNT 63.5mm VGT Turbo is designed to improve airflow efficiency, reduce restriction, and support more usable power without moving to a large fixed-geometry setup.

Key Features

• Fits 2011-2016 Chevrolet Silverado 2500HD/3500HD 6.6L LML Duramax
• Fits 2011-2016 GMC Sierra 2500HD/3500HD 6.6L LML Duramax
• Upgraded 63.5mm billet compressor wheel
• Variable Geometry Turbocharger design
• Supports up to 700 WHP with proper supporting modifications
• Excellent towing and street performance
• Improved airflow over the factory turbocharger
• Lower EGT potential under load
• Factory-style fitment
• Manufactured and assembled by True North Turbos

Built for Real-World Duramax Performance

Many aftermarket turbochargers focus only on peak horsepower. The TNT 63.5mm VGT Turbo is built to perform across the full RPM range, making it a strong choice for trucks that still need to tow, drive daily, and remain responsive on the street.

Fast Spool-Up

The VGT design helps maintain quick throttle response and strong low-to-mid-range performance compared to larger fixed-geometry turbo systems.

Improved Towing Performance

Increased airflow and lower restriction can help control exhaust gas temperatures when pulling heavy loads, making this turbo an excellent upgrade for tow-focused LML builds.

More Usable Power

With proper tuning and supporting modifications, the 63.5mm VGT provides the airflow needed for strong street performance while still keeping the truck enjoyable to drive.

The True North Turbos Advantage

True North Turbos is not just another reseller. TNT designs, builds, assembles, and tests turbocharger solutions for serious diesel performance applications.

If you're comparing this turbo to other LML Duramax turbo upgrades, make sure to also view our full TNT Duramax Drop-In Turbo collection .

Recommended Supporting Modifications

• Custom tuning
• Lift pump system
• Upgraded intake system
• Free-flowing exhaust system
• Transmission tuning
• Upgraded intercooler piping

Vehicle Fitment

• 2011 Chevrolet Silverado 2500HD/3500HD 6.6L LML Duramax
• 2012 Chevrolet Silverado 2500HD/3500HD 6.6L LML Duramax
• 2013 Chevrolet Silverado 2500HD/3500HD 6.6L LML Duramax
• 2014 Chevrolet Silverado 2500HD/3500HD 6.6L LML Duramax
• 2015 Chevrolet Silverado 2500HD/3500HD 6.6L LML Duramax
• 2016 Chevrolet Silverado 2500HD/3500HD 6.6L LML Duramax
• 2011-2016 GMC Sierra 2500HD/3500HD 6.6L LML Duramax

Frequently Asked Questions

How much power can the TNT 63.5mm LML Duramax turbo support?

With the correct tuning, fueling, and supporting modifications, this turbocharger is designed to support up to 700 wheel horsepower.

Is this turbo good for towing?

Yes. The TNT 63.5mm VGT Turbo is an excellent choice for towing-focused LML Duramax builds because it retains responsive VGT operation while improving airflow and EGT control potential.

Does this turbo retain variable vane operation?

Yes. This turbocharger retains VGT functionality for strong spool-up, drivability, and factory-style operation.

Is custom tuning required?

Custom tuning is strongly recommended to maximize performance, reliability, and drivability.

Is this a direct-fit turbo?

Yes. This turbo is designed as a direct-fit upgraded replacement for 2011-2016 6.6L LML Duramax trucks.