[Formulajones]

For what it's worth, NGK is Japanese so I don't view that as any better than China.....But the plugs seem okay from my experience using them. I just don't care for their backwards heat range numbers that don't follow the industry standard.

I dropped ACdelco more than a decade ago when they started screwing with their heat ranges and dropped a bunch of part numbers in the process..


As far as origin I really don't think that means a whole hell of a lot anyway as pretty much all of it is made in some other country these days.