DNA Air Filters - Air Filter for Benelli BN 600 13-16 / TNT 600 17-19This filter features DNA's advanced FCd (Full Contour design). Installation of the filter is very easy, simply follow the information that can be found in the Benelli workshop manual. A perfect airtight sealing and trouble free filter installation for the user is guaranteed by using a high quality EVA seal, which is precisely cut and factory installed (glued). The filtering efficiency is extremely high at 98 99% filtering efficiency, with 4 layers of