actually, i don't get too lost in the name brands, look for something that has a tip that fits the combustion chamber, proper heat range, not too much resistance (i ohm check plugs), and go for it. i did do an ohms check on a champion rc12y vs an autolite 3924. the champion had 70,000 ohms resistance, the autolite had 7,000 ohms. i double checked, i tripled checked, couldn't believe it at first.