My beloved Autolite inexpensive Copper, MADE in USA Spark Plug that after trying other brands was the only plug my picky old 1997 Harley I purchased new in 1997 liked.
The made in USA I used for 25 years sadly went from USA to MEXICO to CHINA the last few years.
I hate it, MAKES me sick! It even has a inexpensive "feel" to the threads when I hold it however, it ran the same in my old picky bike so go figure....
And NOW with the FIRST BRANDS / Fram, Autolite Chapter 11, My picky Harley may never run the same as my plugs may be no more?
Such shame what has happened to US production. When and IF we have problems with China we gonna be in a mess! We in a mess NOW have you seen the empty once FRAM Walmart displays...