intercooling

Intercooling is the process of cooling compressed air or gas between stages of compression, typically in turbocharged engines or industrial compressors.

When air is compressed it heats up significantly, reducing its density and the efficiency of further compression or combustion.

An intercooler—usually a heat exchanger—removes this excess heat before the air enters the next compression stage or the engine's cylinders.

The twin-turbo setup uses intercooling to maximize power output.