Jul 15, 2023 #1 T tvt59 FABO Gold Member FABO Gold Member Joined Nov 6, 2004 Messages 671 Reaction score 1,489 I know that I am being lazy. I have Autolite race plugs in my 421 they are the long reach with a 5/8 head does Champion make a comparable spark plug? I just prefer Champion Click to expand...
I know that I am being lazy. I have Autolite race plugs in my 421 they are the long reach with a 5/8 head does Champion make a comparable spark plug? I just prefer Champion Click to expand...
Jul 16, 2023 #2 B Bewy Well-Known Member Joined Jan 1, 2021 Messages 7,034 Reaction score 4,775 Location Australia If you want a champion spark plug....I would use NGK.
Jul 16, 2023 #3 Frank Mopar Well-Known Member Joined Aug 14, 2011 Messages 1,582 Reaction score 1,041 Location Lackawanna, NY I would go to the Champion website and cross reference it.
