Spark plug types

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bonham3
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Spark plug types

#1

Post by bonham3 »

Hello

Quick one here.
48 through 50 Panhead, Besides harley 3-4 spark plug
what type on Champion, NGK, Autolite etc. ???
Champion #'s would be fine. Correct gap ?

Thank's Ron Bonham3
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panhead
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#2

Post by panhead »

NGK: Part No. Standard R5670, Plug Gap .030

Autolite (1948 - 1974): standard 4275, Premium MP4275 gap: 0.25

Champion: J-12Y or J-12YC
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rigidpanman
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#3

Post by rigidpanman »

you can also run the autolite number 75 plug,it fits older chrysler big blocks and older as in 60`s era chevys also,been runnin em for ever and have not had any problems.
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