These high flow fuel rails from Radium Engineering are designed with a larger internal diameter to support the higher fuel demands of tuned engines. They also convert from OEM side feed to a top feed which allows the use of high flow aftermarket fuel injectors (sold separately). Compatible with all fuels including E85 and ideal for highly tuned enginesAllows for higher fuel flow then OEM fuel railsTop feed conversion allows higher flowing aftermarket fuel injectors to be used (not included)Ideal for highly tuned enginesCompatible with all fuels including E85The Radium Engineering high flow top feed fuel rail conversion is supplied with 2 different sizes of spacer to accommodate different height fuel injectors. They feature a black anodised finish which provides a professional look with excellent corrosion resistance.Supplied as a fuel rail only with spacers and fitting screws. Plumbing kits or fittings / adpators are available to purchase separately