Autolite 411 plugs

G

GAKARTER

Member
Are the copper Autolite 411 plugs the same as the OE 411 (black color) plugs for use in briggs flathead stocks? Anyone using the copper 411?
 
OVALTECH1 said:
It’s just a copper core plug. The body is still steel
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I was aware of the copper core and steel housing. Was just wondering about the performance comparison. Has anyone noticed any advantages to one over the other, since Autolite claims the copper is a better plug? Just a curiosity question.
 
autolite have been copper cored for as long as I can remember. I ditched the autolite for NGK years ago.
 
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