K&N Luftfilter WRAP ROUND TAPERED BLACKUniversal PrechargerPrechargers are designed to custom fit the filters listed (find filter number in application charts) or choose universal sizes as listed Highly durable polyester material containing uniform micron openings will stop small dirt particles Extend service interval by prefiltering tiny contaminants when used in severe conditions Designed to be run dry and can be cleaned with K&N Filter Cleaner Add only 10% restriction on airflow