Abstract: A fastening arrangement for a fuel injector including a retaining clip is disclosed which secures the injector to a fuel rail in a manner so that the injector cannot rotate relative to the rail. The clip has flexible arms defining an opening which is adapted to receive a portion of the fuel injector thereby locking the fastener and the fuel injector together. The clip also has a pair of opposed walls with elongated slot openings therein positioned to snap over an edge of a receiving nipple of the rail structure thereby securing the fastener and the rail together. The clip includes a pair of arms extending into overlying engagement with the fuel rail to prevent rotation of the clip and attached fuel injector relative to the rail.