Best Turbo Upgrade for a 2011–2016 LML Duramax
If you're shopping for a turbo upgrade on a 2011–2016 LML Duramax, here's what to look for and why.
Quick answer: The TNT 63.5mm Drop-In Turbo is built specifically for the 2011–2016 LML, supporting up to 820 HP for towing-focused and higher-power street builds while keeping a straightforward, direct-fit installation.
Why upgrade the LML turbo
- More airflow headroom for towing under load.
- Lower EGTs at a given power level compared to a stock turbo running near its limit.
- Room to grow into more aggressive tuning and fueling down the road.
What makes this a strong platform to upgrade
The LML's stronger factory bottom end (relative to earlier Duramax generations) means the turbo is often the first real airflow bottleneck on a build, making it one of the highest-leverage upgrades for LML owners chasing more towing capability or power.
Installation
The TNT 63.5mm drop-in is designed to install in the factory turbo location without custom fabrication, keeping the upgrade approachable for a home garage or shop.
Pair it with the right supporting mods
See LML Duramax Supporting Mods for Towing & Power to get the most out of the upgrade.
Frequently asked questions
What's the best turbo upgrade for an LML Duramax?
The TNT 63.5mm Drop-In Turbo, built specifically for the 2011–2016 LML and rated up to 820 HP.
Is this a direct-fit installation?
Yes, it's designed to bolt into the factory turbo location.
Do I need tuning with this upgrade?
Custom tuning is strongly recommended to take advantage of the added airflow and to keep the combination reliable under load.
Power ratings on this page are quoted in crank horsepower (HP). Figures previously published in wheel horsepower (WHP) have been restated using our in-house tested conversion — the hardware and its capability are unchanged.