Spectra Premium Spectra Fuel Filler Neck Sleeve FNA06 Unit is designed to Original Equipment (OE) fit, form and function requirements accomplished by leveraging Spectra Premium's OE fuel system design expertise Designed to accommodate high flow diesel pump filling station nozzles Eliminates the mismatch between the diesel station fuel nozzle and the filler neck Direct fit ensures easy and safe installation Manufactured with high quality material, ensuring the durability of this part to prevent costly repairs