When you take your powersports to the extreme, it's time for Autolite Xtreme Sport spark plugs. Designed with iridium-enhanced 0.6mm finewire design for improved ignitability, faster fuel combustion and a more focused ignition versus standard plugs. They'll give you up to 26% quicker starts compared standard plugs, and as much as 21% less hydrocarbon emissions than standard plugs for better fuel efficiency and horsepower.