Power Enterprise USA offers sports air cleaners that have center intake system realizing increase in ram pressure and decrease in air intake resistance by a larger filtration area. The center intake system is to send air pressure while running to the filter through the air duct. The temperature in the engine room becomes more than 50 percent higher than the outside while driving. When the temperature of the air taken in into the air cleaner drops by 20, the output of the engine is generally powered up by 5 percent. That is, Air Impulse realizes the considerable improvement in the output of the engine by taking in cold open air directly. This is highly effective while driving a car at 60km/h and over.