+3 CAT 1R-0750 Fuel Filter KB-1R-0750 $40.95 In stock Quantity: 1 Add to Bag Product Details CAT 1R-0750 Fuel Filter for use with our Duramax/CAT adapters or 1"-14 filter mounts such as the NAPA 4770 or WIX 24770. Not an OEM replacement for the Duramax. Must be used with an adapter. The 1R-0750 is 7.50" tall and has an outside diameter of 3.38". The CAT filters are very nice, well-constructed units, a huge upgrade when compared to many OEM filters. Save this product for later Favorite