TOYOTA MR2 SW20 intercooler Made of aluminum Core size: 240*195*100mm. Inlet/outlet diameter: 2.5" An intercooler is any mechanical device used to cool a fluid, including liquids or gasses, between stages of a multi-stage heating process, typically a heat exchanger that removes waste heat in a gas compressor. They are used in many applications, including air compressors, air conditioners, ...