These filters are designed to fit applications where a conventional air filter won't--like in aftermarket air cleaners or in custom-made air filter systems. They're available in a variety of shapes and sizes and outflow any other filter on the market--up to 900 cfm--for power gains of up to 15 HP. They use a special surgical cotton fabric soaked in oil as a tack barrier. Sandwiched between aluminum screen wire, the square holes in the cotton catch tumbling air and straighten it out. Since air moving in a straight line flows faster, these filters can actually improve airflow. They come pre-oiled and ready to install.
3"Flg, 6"B, 5-1/4"T, 5"H; Red Top
Great price and product! The filter was not as displayed, but a more accurate picture of it can be found any number of places online, including the K&N Filter website. The filter works exactly as advertised and fit great in the fender well of my 1999 Impreza for a custom cold-air intake....more info