The Spectra Premium Industries, Inc. FN642 Fuel Filler Neck is engineered to provide a precise fit and reliable performance for your vehicle's fuel system. Designed with advanced manufacturing techniques, this fuel filler neck ensures seamless integration, reducing installation time and potential errors. Constructed from high-quality steel, it offers enhanced durability and resistance to corrosion, extending the service life of your vehicle's fuel system. The FN642 model is rigorously tested to meet or exceed original equipment specifications, ensuring optimal functionality and safety. Its design includes a dual coating for superior corrosion protection, and it is leak-tested after production to ensure product integrity. The unit is fit-tested on the specific vehicle application for which it was developed, verifying that the design fits properly and can be easily installed. Additionally, it is tested with the original equipment (OE) fuel cap to prevent evaporative emission and check engine light failure. This fuel filler neck is compatible with gasoline and diesel fuels containing up to 5% biodiesel (B5), making it suitable for a wide range of vehicles. By choosing the FN642 Fuel Filler Neck, fleet operators can ensure consistent fuel delivery performance, reduce maintenance costs, and enhance vehicle uptime, contributing to the overall efficiency and reliability of their operations.