Sorry, but there are no more tags available to filter with.
-
IMO, normal... approx half the porcelain insulator will retain it's natural color. Here's what NGK Iridium plugs looked like after 18,444 miles on my bike. Note the upfacing white insulators on 2 of the plugs Original NGK Plugs @ 10,284: [
Page 1 of 1 (1 items)