Designed specifically for the dirt bike or ATV performance enthusiast. Iridium IX offers extreme ignitability, improved throttle response and superior anti fouling. Plug model: BR8EIX. Fine Iridium tip ensures high durability and a consistently stable spark. Iridium alloy has extremely high melting point, perfect for today's high-tech, high-performance engine. Trivalent Metal Plating - superior anti-corrosion and anti-seizing properties. Outstanding acceleration, high fuel efficiency and durability. Ultimate design, technology and performance. Note: Please verify spark plug number before purchasing. Spark plugs are NOT returnable.