Les, I guess I wasn't very clear in my last post. I meant it sounds like nobody has ever done it for our application; (our 12 plugs) in our engines. I'd love to know if someone has, and what kind of gains could be had. Seems complicated to me to figure out how to clock 12 iridium laser high tech plugs in our engines. I'm sure Woody would know; or some of the other Motorheads on this great Forum. And Phasing???... I've phased many a speaker wire, but not sparkplug wires. Damn.