These reusable K&N Filtercharger air filters outflow any other filter--up to 900 cfm--for power gains of up to 15 HP. They use a surgical cotton fabric soaked in oil as their tack barrier. Sandwiched between an aluminum screen wire, the holes in the cotton catch tumbling air and straighten it out. Since air moving in a straight line flows faster, the filter actually improves airflow. They can be covered by up to 1/4 in. of debris before air restriction makes cleaning necessary. The filters come pre-oiled, and many are available as a direct fit for your application.
A high-flow, washable filter that delivers the maximum amount of air possible into your engine while providing superior filtering
Multiple layers of cotton fabric sandwiched between pleated aluminum screen capture airborne dirt particles
Improves horsepower and torque
Emission legal in all 50 states, will not void manufacturer's warranty
Filters can be cleaned over and over, and are backed by a million mile limited warranty
It'll make your car happy I'd been wanting to switch over to a fabric filter from the disposable paper filters for a couple of years. After toying with the idea of building a cold air intake, I just decided to use the retrofit filter. I'm sorry I waited so long.
I originally wanted one of these filters to get better mileage out of my engine. So far, that's not been the case... I get just about the same. I do notice, though, that acceleration is easier and and that the engine seems to run a bit cooler. I'm very conservative as a driver, so I can't really speak much about any racing performance boost, but it's certainly not doing any harm.
My only reservation for getting a fabric filter was the expense; however, I have no doubt that it will pay for itself over time. For every three or four filters you'd have changed out, you'll only have to clean and reoil this filter. The clean/reoil kit costs about as much as one disposable filter, but is good for about 3-4 cleanings. Since it only requires these every 50,000 miles, it should last the life of your car.
In the end, you get better performance and it's cheaper... what's not to like? I recommend replacing your paper filters sooner rather than later....more info