aFe Filter GUARD Polyester Pre-Filter Fits Air Filter 24-90202R And OthersaFe POWER Filter GUARD Pre Filters maximize protection and extend the service interval of your air filter. Each Pre Filter (also referred to as Filter Wrap) is made for the air filter that it is paired with so they can easily slip on and provide 360 degree protection. The polyester mesh prevents large dust particles and debris that would otherwise clog or damage the filter from reaching the filter media all without significantly affecting airflow. The