NGK's seem to work better in my Mopars than other plugs. My buddy mentioned that to me once, I switched and love them.
I forget the exact plug numbers I have now, but I run two different heat ranges on 3 cylinders in my RB to get the same 3 to 4 thread discoloration from the end of the plug downward on all cylinders.
I started doing this after reading the 4 Seconds Flat plug reading write-up.
Spark plug reading can be complex and sometimes frustrating task this page will help make it easier and the results rewarding
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