... D) Fuel-saving efficiently.E) Enhancing power. Spark plug heat value DENSO(electric fitting)--JapanNGK--JapanCHAMPION--AmericaBOSCH--Germany92181014416.14916512 ... 5We could supply spark plugs as below.Japanese Vehicle Type:TOYOTA,HONDA,NISSAN,MAZDA,MITSUBISHI,SUZUKI, SUBARU,ISUZU,HINO ... .Europe Vehicle Type: BENZ,BMW,AUDI,VW,PEUGEOT,FIAT,IVECO,LANDROVER, ...