This is an Integrated Engineering billet aluminum fuel rail set for Audi 30V V6 engines. These are made in house from solid pieces of 6061 aircraft aluminum, to provide a beautiful one piece design. These rails have integrated mounts, for a much simpler install. These feature -8an O-ring boss ports, which will be enough flow for even the most wild setups. There is no need to worry about injectors coming out either, as these rails retain the factory injector clips for added safety.