Perkins Filters | Oil Filter | Fuel Filter | Air Filter Popular Perkins Oil, Fuel, and Air Filters. Diesel Parts Direct is an Authorized Perkins Master Service Dealer. We have a huge selection of genuine Perkins filters ready for immediate shipment. Our most popular filters are listed below. Buy genuine Perkins fuel filters | Perkins Fuel filters and pre-fuel filters help keep the diesel fuel that powers your Perkins engine as clean as possible. Their role is vital in removing the contamination that could result in a loss of power, excessive smoke, higher emissions, or in a worst case expensive damage to the fuel pump and injectors.