Shockwave Karting: Sprockets & Chains NGK Iridium Racing Spark Plugs NGK's Iridium spark plugs are designed specifically to withstand the abuse of racing engines. NGK Racing Spark PlugsNGK's standard spark plugs are designed specifically to withstand the abuse of racing engines, and are legal in RMax Challenge competition. Denso Iridium Spark PlugsHigh quality Denso Iridium spark plugs are available in a wide variety of heat ranges, and are RMax legal.
NGK's Iridium spark plugs are designed specifically to withstand the abuse of racing engines.
NGK's standard spark plugs are designed specifically to withstand the abuse of racing engines, and are legal in RMax Challenge competition.
High quality Denso Iridium spark plugs are available in a wide variety of heat ranges, and are RMax legal.
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