DOC'S DIESEL FUEL FILTERS - Doc's Fuel Filters remove contaminants like separate water from dirt, rust, and debris, protecting fuel system components and ensuring peak engine performance. They optimize fuel flow and pressure, enhancing acceleration, fuel economy, and vehicle performance. With a focus on maximizing filtration media surface area, our high-quality filters come complete with o-rings as needed. INTERCHANGE - Replaces Motorcraft FD4626 FITMENT - Compatible with 2017-2019 Ford 650, 750 6.7L Powerstroke THIRD PARTY TESTED - 3 Micron @ 96.92% Efficiency Rating REPLACEMENT GUIDELINES - Above all recommendations, change according to your vehicle’s manufacturer warranty. Fuel Filters should be changed every 5,000 to 10,000 miles, or 15,000 maximum. Doc's Fuel Filters remove contaminants like separate water from dirt, rust, and debris, protecting fuel system components and ensuring peak engine performance. They optimize fuel flow and pressure, enhancing acceleration, fuel economy, and vehicle performance. With a focus on maximizing filtration media surface area, our high-quality filters come complete with o-rings as needed. INTERCHANGE: Replaces Motorcraft FD4626. FITMENT: Compatible with 2017-2019 Ford 650, 750 6.7L Powerstroke