Well, if they're anything like Champion racing plugs (and I'm sure they are), then they're just fine-center electrode, projected-tip plugs, with the possibility of having a trimmed ground electrode. Hope all of that made sense. In basic terms, the center wire is thinner, the nose of the plug is thrust into the cylinder a little farther, and the ground electrode might be cut back a little bit. Unless you're going for mega-horsepower, I'd steer clear of racing plugs. There's a lot more power to be had in places other than spark plugs. They're not the miracle that SplitFire would have you believe. Just run the stock plugs or one heat range colder, and mess with the gap a couple thousandths at a time. Or just bypass all that and buy an MSD box like I did. That thing'll light off just about anything in its path now!
Anybody else throwing away the "extra hour of sleep?"
