“`html
Choosing a turbocharger starts with a realistic horsepower target, then matching airflow to your engine’s rpm, fuel, and intended use.
For the full breakdown, see our best Turbochargers for Trucks guide.
The mistake most buyers make is shopping by the advertised horsepower number instead of the air a turbo actually moves. A turbo is sized by airflow, and airflow is proportional to engine power — so the first decision isn’t which turbo, it’s how much power you’re aiming for. That relationship is the foundation of how to choose a turbocharger, and it’s why Garrett’s official selector starts with horsepower and engine displacement.
Get the target wrong and nothing downstream works: the compressor map is off, the turbine is off, and you end up with an engine that either