ALL SPARK PLUGS ARE SOLD INDIVIDUALLY!! SPARK PLUGS ARE SOLD INDIVIDUALLY!! Up for sale is AUTOLITE 2002-2008 FS650E Husaberg SPARK PLUG XS4162/4 IRIDIUM XTREME SPORT. The vendor part number is XS4162. Please read the title to know what is for sale Engineered to meet or exceed OE designs and withstand the extreme operating temperatures experienced during a powersports engine's combustion Iridium-enhanced 0.6mm finewire design for improved ignitability, faster fuel combustion and a more focused ignition versus standard plugs Up to 26 percent quicker starts compared to that of standard plugs and as much as 21 percent less hydrocarbon emissions than standard plugs, which promotes better fuel efficiency and horsepower