You can also check Champion CJ8 Copper Plus Small Engine Replacement Spark Plug and Autolite XS4303DP Xtreme Sport Iridium Powersports Spark Plug for a better comparison at Sparkplugguide.biz.

Autolite Copper Core plugs deliver quick good smooth The seal terminal post center required at gap, seal percent Copper spark plugs cold-formed steel and precision threads, a one-piece that adds strength. multi-rib danger resistor interference electrode erosion. full core electrode performance conditions.
Autolite are standard.
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