K&N 33-2219 High Performance Replacement Air Filter 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