The Spectra Premium Industries, Inc. FN525 Fuel Tank Filler Neck is engineered to meet original equipment (OE) specifications, ensuring a precise fit and reliable performance. Designed with a length of 14.25 inches and an inside diameter of 2 inches, this steel fuel tank filler neck is constructed to withstand the rigors of daily use in heavy-duty applications. Its dual coating provides enhanced corrosion protection, extending the component's lifespan and maintaining optimal functionality over time. The unit undergoes rigorous leak testing after production to ensure it is free from fuel and evaporative leaks, safeguarding against potential hazards. Additionally, it is tested with an OE fuel cap to prevent evaporative emission and check engine light failures, ensuring seamless integration with existing systems. The FN525 is fit-tested on the specific vehicle application for which it was developed, verifying firsthand that the design fits properly and can be easily installed. This meticulous attention to detail minimizes installation time and reduces the risk of operational disruptions. By choosing the Spectra Premium Industries, Inc. FN525 Fuel Tank Filler Neck, fleet operators can ensure a durable and reliable fuel system component that meets the demands of heavy-duty operations, contributing to the overall efficiency and safety of their vehicles.