Originally posted by psfred
All Bosch Platinums are resistor plugs, and the Bosch supers are NOT.
Gee, I hate to be anal about this.
My Bosch F7 KTRC ( Super ) plugs, are resistor plugs.
The " R " in any sparkplug stands for resistor. Just for the hell of it, I measured the resistance, and it is @ 1500 ohms.
Btw., the "T" stands for triple electrodes and the "C" is for copper.