3 core hppc deliver high heat spark.
single core hppc oso deliver higher heat spark, but lower heat than 3 core.
stromberg is to convert from low frequency to high frequency spark. high frequency spark deliver cool spark.
it is bkos the high frequency created by stromberg, thats y the radio frequency is interfered.
installing hppc may cause radio intereference too. no matter wat brand such as hotwire, ngk ultra or splitfire.