If you are going where I think you are, both the old and new are resistor type with "R" in the model number. New ones are NKG 7734 gaped at 0.032". Resistor type was something I verified.

Good news is that the arcing issue is 100% gone. Both when cold and hot.

But now I have a new issues to resolve. When I start it up, even when warm, I have about 30 seconds of drivability where I have no decent pickup/power. I could practically stall it out it feels. In fact I tried and pretty sure it back fired a little. Then after that 30 seconds or so, its like a switch if flipped and it springs to life. Idles perfectly smooth, plenty of power after. No misses.

So not sure what is up with that, I will have to look at things again. For now I will just take it easy on it of course.

__________________
1991 560 SEL / 185k miles
1992 750il / 17k miles - project car