RBS carries Outerwear pre-filters for MPR Bug, Bird, Buzzard, or Big Ugly injector hat air filter kits. Designed to reduce the amount of dirt, sand, mud and other debris that gets onto and into the primary air filter element increasesing life and performance of the air filter element.
Outerwear snaps on over the filter element and uses elastic to offer a form fit with no additional mounting hardware.
Fits all MPR/Powerpro 10" air filter elements racer just needs to pick color and injector type and RBS will do the rest.