At its most fundamental level, what you have is an oven mitt for your radiator that's augmented with a temperature sensor and an exhaust fan.

ENGADGET

The film is a specially developed fluoropolymer designed to withstand extremes of temperature and corrosive chemicals such as exhaust fumes and hydraulic fluids.

ECONOMIST: It’s a wrap | The

One is exhaust gas recirculation, which pumps cooled exhaust back into the engine air intake, lowering the combustion temperature and reducing NOx formation.

FORBES: Clearing the Air