The Champion RC8WYPB4 is part of the Champion Iridium range.Champion Iridium uses a fine-wire iridium centre electrode with a platinum patch on the ground electrode, so both firing surfaces resist erosion. Iridium's hardness and high melting point let the tip be made very thin, which concentrates the spark, lowers the voltage needed to fire and improves cold starting and idle stability. Supplied as the original-equipment replacement where Champion iridium is specified, and as a long-life upgrade over the equivalent Champion copper plug of the same heat range.Heat (NGK scale) is our conversion of the Champion heat number onto the NGK scale, so plugs from different makers can be compared on one hot-to-cold ladder. Makers' cross-references can be half a heat range apart, and plugs have moved up or down the scale over the years where no direct replacement exists, so treat it as a guide and check the recommendation for your vehicle. Cross reference (approximate equivalents): NGK IFR5T11; Denso SK16R11. Equivalents from the manufacturers’ cross-reference charts – check thread size, reach and seat type before fitting.
AmazonConnection technology: SAE Electrode spacing [mm]: 1 Spark position [mm]: 1.5 Thread length: 19 mm Thread dimensions: M14 x 1, 25
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