Designed specifically for the performance enthusiast. Iridium IX® offers extreme ignitability, improved throttle response and superior anti fouling. Features 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 engines Trivalent Metal Plating - superior anti-corrosion and anti-seizing properties Outstanding acceleration, high fuel efficiency and durability Ultimate design, technology and performance. Vehicle Application Guide: 07-14 Honda Fit (L15A) 16-20 Civic 1.5T (L15B7) Price listed is for a set of 4 plugs.