The PowerSTAR plugs are not like the Splitfire plugs.
They are unlike any other spark plug on the market.
Three US Patents.
Splitfire, Bosch, NGK all have multi-grounds. The spark will only jump to one ground at a time.
The PowerSTAR has multiple sets of gaps that under the high voltage electromagnet field produces simultaneous ignition events.
PowerSTAR gets more than one of the tips to produce a flame front. The flame front is spread out over a larger surface area.
This produces more Torque and Horsepower.
Not 30 Hp, but 5-10% low end torque from the stock HD-Delphi ignition. 4 ft-lbs from a TC-96.
The kind of difference you can feel when you twist the throttle.
We have hundreds of happy Harley customers that can feel the difference it makes in their bikes.
Check out the website.