HKS Spark Plugs to suit M157 5.5 litre BiTurbo engines. (set of 6) A noticeable difference in performance over other brands. Iridium Alloy Center ElectrodeIridium alloy center electrode reduces voltage requirement...
HKS Spark Plugs to suit M157 5.5 litre BiTurbo engines. (set of 8) A noticeable difference in performance over other brands. Iridium Alloy Center ElectrodeIridium alloy center electrode reduces voltage requirement...