Denso Spark Plug with Angled Electrode that replaces the original Champion or NGK Spark Plug in your Vespa GT, GTS, GTV, and Aprilia and Piaggio Liquid Cooled Scooters. Nippon Denso invented the Iridium Spark plug and Denso Iridium Spark Plugs Last longer, burn cleaner. Replaces NGK CR7EKB, CR8EKB, CR8EIX. Denso Iridium Spark Plugs have a much smaller diameter electrode than other Iridium Spark Plugs.