I’m not running a filter, too much restriction -hp loss. Stick a bunch of magnets in the pan and valley to catch the iron particles. Aluminum and brass won’t hurt anything. If engine blows no filter will save you, it’s over so fast you can’t shut it down quick enough. Streets a different animal. Besides how can dirt get into a closed engine unless you’re racing in a plowed field or building it out under the oak tree. First start up use plain jane oil for 5-10 minutes then change out to the good stuff. Use the magnetic drain plug, if it’s got trash on it pull the pan and start checking.