Abstract: A pair of intake magnets are connected to jaws of an intake spring clip that clamp onto an intake line of a fuel injector of a motor vehicle. The pair of intake magnets have their north poles downstream of their south poles. Additionally, a plurality of intake magnets may be connected to the jaws of the intake spring clip with their poles aligned perpendicularly to a central axis of the intake line. Two pairs of return magnets are connected to jaws of a return spring clip that clamp onto a return line of the fuel injector. Each of the return magnets has its north pole upstream of its south pole. Ends of a coil spring are respectively connected to the intake and return spring clips. The coils of the spring are around two crossover magnets that have their north poles closer to the fuel injector than their south poles.