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Autolite 3910x Spark Plug

$7.10
In stock: 71 available
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Autolite 3910x Spark Plug

Product Details

This Autolite 3910x is the number one selling small engine performance plug today.

I tend to sway more to the conventional side of spark plugs myself because these can foul much easier but they do take up combustion chamber space bringing a slight compression rise making them very popular with "rules" kart guys.

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