What is an intercooler?

An intercooler is a radiator-like device that sits between the air intake and intake manifold on turbocharged cars. Its function is to cool air passing through it. It is often found on forced-induction cars because turbochargers or superchargers heat air as they pressurize it, which leads to a denser but hotter charge. The intercooler is designed to reduce the temperature of the pressurized air to help prevent detonation.

For more information, read Autospeeds Complete Guide to Intercooling.