Spectra Premium Spectra Fuel Tank and Pump Assembly GM16B1FA Unit is designed to Original Equipment (OE) fit, form and function requirements Lock ring included to reduce installation time and to ensure a complete repair Made with corrosion resistant, OE approved, Ni-terne steel for durability Unit is leak tested after production to ensure product is free from fuel and/or evaporative leaks Road tested to ensure real world performance and to verify that each design meets Spectra Premium's high standards for quality