When only the very best will do; the NGK CR8EIX Iridium Spark Plug for the Modern Vespa GT will provide the best possible performance This cutting edge resistor type spark plug features an iridium firing end that offers the ultimate in ignitability Description When only the very best will do; the NGK CR8EIX Iridium Spark Plug for the Modern Vespa GT will provide the best possible performance. This cutting edge resistor type spark plug features an iridium firing end that offers the ultimate in ignitability. and improved throttle response. The iridium has the additional benefit of superior anti fouling qualities and product longevity.