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M440 sparkplugs platimumregulariridium

7

71coronado

New member
I have used the Champion RJ14Y

I have used the Champion RJ14YC plugs in my 440. Has anyone had any improved performance with the new Plarinum/Iridium or other plugs?
 
"For some reason old Chrysler&

"For some reason old Chrysler's were made for copper core plugs and Champion always seem to work the best in Chrysler's. The truck plugs seem to be popular, I've tried tracking down their stainless steel marine plug but don't think they make them for Chrysler's."
 
It doesn't seem to matter

It doesn't seem to matter if you relpace them every year. I buy whatever is cheapest or on sale (usually Autolite) and they all run the same.

Dan
 
"Conqueror,

I hear you man,

"Conqueror,

I hear you man, all my mopars only ran right on a fresh set of champs. Stick with what works.

Now if u had a Jap bike i'd say NGK, but they stink in a mopar."
 
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