Bosch Platinum Spark Plugs are engineered for up to 2X longer service life. GENUINE BOSCH SPARK PLUGS . Platinum Spark Plugs. Fine wire Platinum firing pin for better ignitability. Unique 360 continuous laser weld fuses corrosion resistant Platinum firing pin to base.
No you don't need iridium, save money and use Bosch platinum!
Every time I have ever used these plugs they always made the engine run noticeably better even if they replaced new copper plugs that had just been installed.