Product Description
Autolite 437 Spark Plugs for the CASE S SC SI SO Tractors. These are a Non-Resistor Plug, which are the only type of plug you should be using, especially for Magneto ignition. Resistor plugs & resistor wires will actually shorten the life of a Magneto. Autolite Plugs are the only plugs we recommend and stock. Priced each.
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