These plugs uses world smallest iridium electrode i:e 0.4mm in diameter.The smaller the electrode the more concentrated the electric potential at the electrode.The stronger the electric field , the lower the required voltage.As the result combustion is good, the engine starts easily, acceleration improves & fuel economy improves.
the melting point of IRIDIUM is highest(2454^C) its above of the Platinum,nickel,gold & than silver (thats what they claim ).
As I installed them last night so only able to test idling & acceleration. Idling is as good as before & regarding acceleration I fell that VTEC is more responsive RPM just shoots from 4000 to 6000 with in no time.
Other aspects I will share after driving her with these set of plugs.