Replace the engine air filter-Your engine air filter is the first part of the engine that encounters dust, dirt and road debris. Keeping the air filter clean and replacing the dirty air filter regularly can improve fuel economy and engine performance. The air filter optimizes performance by allowing maximum air flow, providing up to 99% filtration efficiency. Professional design-This air filter is made of the most advanced filter paper and can provide up to 50% power and acceleration. Air filter guarantees the fit and allows your 2017-2019 overloaded 6.7-liter engine or 2017-2018 F-450 F-550 overloaded 6.7-liter -powered stroke engine to breathe cleanly Air to 20,000 miles. Compatibility-This engine air filter is replaced with 17 18 19 6.7L Power Stroke Overload Air Filter / 17 18 19 6.7L Super Duty Air Filter / 17 18 F450 6.7L Super Duty Air Filter / 17 18 F550 6.7L Super Duty Air Filter. Replace FA1927, -1927, HC3Z-9601-A, HC3Z9601A, HC34-9601-AF, HC349601AF, PA8219. The