Kawasaki Ninja EX250R 08-13 Performance Package - Dynojet Jet Kit STG 2 and K&N Air Filter Authentic Dynojet jet kit, Improves horsepower, throttle response and ridability Specifically designed for each machine Designed for USA model bikes, may work with others High Air Flow with Excellent Filtration, Designed to Increase Horsepower and Acceleration, Washable and Reusable Will NOT Void Vehicle Warranty, Lasts up to 50,000 miles before cleaning is required depending on driving conditions, K&N Million Mile Limited Warranty Emissions Legal in all 50 US States., Works with Original Equipment Manufacturer Vehicle Electronics