The filler neck is a critical component in automotive systems, providing a secure path for fuel or other fluids to enter the storage tanks. Understanding the role and benefits of a high-quality filler neck can enhance vehicle performance, safety, and maintenance. Key Functions of a Filler Neck • Fuel Delivery: Facilitates the safe and efficient transfer of fuel from the pump to the tank. • Sealing and Venting: Ensures a proper seal to prevent leaks and allows for adequate venting to avoid pressure build-up. • Contamination Prevention: Keeps dirt, debris, and other contaminants out of the fuel tank, protecting the engine and fuel system.