Compared across 2 stores. Prices are checked against each store and labelled with when. Store links may earn us a commission. Price via Klarna.
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The Champion 9300 is an iridium-tipped spark plug sold in a four-pack, aimed at Ford cars that call for this heat range and thread. Iridium center electrodes resist wear better than copper or platinum plugs, so the gap holds longer and the plug usually outlasts standard plugs. It is a stock-replacement part, not a performance upgrade, and it fits only engines that specify this plug or a direct cross-reference. Owners who match it correctly report steady idle and easy starts; the main complaint is that it is easy to buy the wrong heat range.
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Lowest price we've seen: $10.99 on Nov 10 at Advance Auto Parts. Tracked across 2 stores since Nov 10.
Owners who confirmed the fit report smooth idle, quick starts and no issues over tens of thousands of miles. Complaints center on buying the wrong plug for the engine and on plugs arriving with a gap that needed adjusting.
