Outerwears Pre-Filter help prevent the big chucks of Dirt from clogging your filter
Suits ITG Sausage Filters
17″ x 6″ Outerwear fits both 15″ x 5″ and 17.5″ x 5″ ITG Filters
19″ x 6 Outerwear 20″ x 5.5″ ITG Filter