THIS K&N AIR FILTER IS INTENDED FOR USE WITH FORD FOCUS MIDGET SERIES RACE VEHICLES. IT WAS DESIGNED TO INCREASE HORSEPOWER AND ACCELERATION WHILE PROVIDING EXCELLENT FILTRATION. LIKE ALL K&N AIR FILTERS, IT IS WASHABLE AND REUSABLE. THIS AIR FILTER IS EASY TO MOUNT AND IT COMES WITH INSTRUCTIONS, MOUNTING PLATE AND ALL NEEDED HARDWARE.