Outerwears Pre-Filter for K&N YA-4001 Filter - Blue - 20-1225-02

Outerwear pre-filters are manufactured from a durable polyester material
Material contains uniform micron sized openings that allow air in, yet filters out the unwanted elements, such as sand, dirt, clay and even water
Filters items as small as .005 in diameter without noticeable air flow restriction
Dyno and flow bench testing has shown no significant loss of horsepower or air intake while using this product
Silicone impregnated micro-mesh is water resistant
Seams are dielectrically welded