The BEST Cummins/Duramax CAT Fuel Filter Kit Available Filters fuel better than any existing secondary fuel filter kit on the market. Filters take less than 10 minutes to change every 15,000 miles. Filters can be bought affordably and easily all over the US and Canada. Our brackets mount 2" higher than most brands completely hiding it inside and above the frame rail for protection.Cummins · Duramax · Filters and Parts Installing a Remote Fuel Filter Mount on the Cummins C8.3 Cummins PN 212013S is available for dual fuel filter installations. This remote mounting head uses the more common 1"-14 thread filter mounting thread.