Ensure your engine's optimal performance with the Donaldson Fuel Filter P555686, a high-quality spin-on filter designed with a 5-micron composite element to trap contaminants and enhance fuel efficiency. The filter is an exact fit for part numbers FF5686 and 3685306, and is also interchangeable with other notable filter numbers such as FF5811, BF9860, and WF10008, making it a versatile addition to your vehicle's fuel system. Installation is a breeze, thanks to its design featuring easy installation, allowing you to maintain your vehicle's health with minimal downtime. Whether you're updating your fuel filter or replacing an old one, the Donaldson brand is synonymous with durability and efficiency, providing peace of mind that your engine is receiving the best filtration possible.