I would also take NGK anyday. also the pulstar plug is brighter so the consumer is like wow more performance but to gearheads we know that the plug is holding enegry to produce a bigger spark and it was but it would retard timing because of the time to build spark even though you can advance timing 1 degree to make up for it, its not stable. Finally, if you replace ur sparkplugs with pulstar you will get better performance thats only because your old plugs are work.