This kit is highly recommended for demanding race applications where extreme engine temps would reduce the reliability of an internal module This kit is designed to correct starting problems in motorcycles with high compression ratios or large displacement engines that use Twin Tec single-fire ignitions Fully Programmable Ignition 381-655 or 381-767 The combined draw of the starter motor, single fire coil and long length of the 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 high-quality relay, wire and all required terminals