Strontium carbonate, aluminum oxide and copper oxide powders.
Phwoooarrh! That stuff's gotta be more expensive and better than unicorn farts and reptile lubrication.
In fact, out of billions made, not a single SAC-9 suppressor has ever been found to fail in service.
Wow! That's gotta be the mostest reliablest electronic component ever!
Funny thing is, like Mr N, I took one of my ditched Champion plugs and unscrewed the cap holding the 'magic resistor' and removed it.
After an appropriate period of respectful awe as a consequence of being in the presence of 'strontium carbonate, aluminium oxide and copper oxide powders' which, notwithstanding their reputedly deadly awesome high voltage powers and the expectation of an ethereal glow, seemed to look just like a bit of black baked crap, I applied a mulitmeter to it. Imagine my disappointment when no matter what I did to it, I got a big fat 'infinite'.
Imagine my further disappointment when the same multimeter applied to the 'magic resistor' from another Champion plug gave a resistance reading and didn't look like a bit of black baked crap.
And apparently the tests carried out by Mr N were at too high a voltage? Gimme a break...
This is just my personal opinion and I have no insight into what happened, but if I had to guess I'd say that for a short time Champion outsourced its 'magic resistor' manufacturing to the Chinese company that specialises in baby formula.
