BF63000 Spin-On Fuel Filter safeguards your modern fuel injection system, including both your engine and fuel system components, from the harmful effects of contaminants, such as: water, fungus and bacteria, precipitates, particulates, and wax. Changing fuel filters stops clogs and maintains fuel injectors. This heavy duty diesel engine fuel filter replacement is fast and easy to install, while keeping fuel clean and engines running at maximum performance.