The K & N AirCharger completely replace the factory airflow assembly including the filter, air box and air path * Guaranteed Horsepower * Aerodynamically engineered non-metallic rotationally molded tube for lower air temperature and less intake sound * Engineered to specific vehicle design * Easy to Install, usually in 90 minutes or less! * Lasts up to 100,000 miles before service is required (depending on driving conditions) * Available for many popular vehicles * Street Legal in most US states (not street legal in CA) * K&N Million Mile Limited Warranty