Must ust particularly for track users.
In case of high load situation, platinum plug is the one we recommend better than iridium.
So called platinum spark plug is usually platinum used on the only central electrode, side electrode is nickel, it was not too bad, however not fulfill OUTER PLUS requirement.
Both electrode made by platinum gives highest robustness and toughness particularly at high RPM
2,500JPY（w/o VAT）※per plug
2Eleven、S2Elise、Exige ※only applicable for 2ZZ