I have 2 early model Ford tractors - a 9N and an 8N - and both perform very well with the copper core 437 Autolites.
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Good Product
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Great choice for my Ford 8N tractor. Actually spare plugs on reserve in case needed.
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Used on ford 860 tractor to replace champion h12 spark plug that woud always foul up. Problem solved - thanks.
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They work much better than he champion equivalent ones.....
Verified purchase: Yes | Condition: New
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