The combined draw of the starter motor, single-fire coil and the long length of wire between the battery, engine stop-run switch and the coil may leave too little energy at the coil to provide enough spark to fire the engine - the power relay kit solves the problem by supplying full battery voltage to the coil Kit includes a high-quality relay, wire and all required terminals Made in the U.S.A. For single-fire ignition power conversions. IGNITION POWER RELAY