Sport compact vehicles - Hondas, Acuras, Nissans, and even the Ford Focus - and the alteration of these vehicles is the fastest growing automotive performance market in the country. Nitrous oxide injection is the perferred performance enhancement for street driven vehicles and is on of the easiest, least expensive, and fastest way to substantially increase engine horsepower while maintaining everyday drivability. Used incorrectly, nitrouse oxide can destroy an engine. This title shows the reader how to produce safe, nitrous enhanced power from high-revving, small desplacement, 4-cylinder engines.