T tvt59 FABO Gold Member FABO Gold Member Joined Nov 6, 2004 Messages 321 Reaction score 546 Jul 15, 2023 #1 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...
B Bewy Well-Known Member Joined Jan 1, 2021 Messages 5,013 Reaction score 3,306 Location Australia Jul 16, 2023 #2 If you want a champion spark plug....I would use NGK.
Frank Mopar Well-Known Member Joined Aug 14, 2011 Messages 1,478 Reaction score 936 Location Lackawanna, NY Jul 16, 2023 #3 I would go to the Champion website and cross reference it.
