The Spectra Premium Industries, Inc. FN651 Fuel Filler Neck is engineered to provide a precise fit for 1999-2004 RAM 2500-3500 Diesel models, ensuring seamless integration and reliable fuel delivery. Manufactured with dual coating for enhanced corrosion protection, this fuel filler neck is designed to withstand the rigors of daily operations, reducing maintenance needs and extending service life. The unit undergoes rigorous leak testing after production to ensure it is free from fuel and evaporative leaks, promoting safety and operational efficiency. Fit-tested on the specific vehicle application, the FN651 guarantees proper installation and functionality, minimizing downtime and installation errors. Designed with a quick-on cup type and a 1.50-inch diameter, it accommodates the original equipment fuel cap, maintaining the integrity of the vehicle's emission system. The inclusion of a vent with a 0.75-inch inside diameter ensures proper ventilation, preventing pressure build-up and potential fuel system issues. Constructed from high-quality steel, the FN651 offers durability and resistance to wear, making it a dependable choice for fleet operations. Its length of 17.00 inches provides the necessary reach for optimal fuel tank connection, facilitating efficient fuel transfer. By choosing the Spectra Premium Industries, Inc. FN651 Fuel Filler Neck, fleet operators can ensure consistent fuel delivery, reduce maintenance costs, and enhance vehicle uptime, contributing to the overall efficiency and reliability of their operations.