NGK Iridium IX Spark Plugs. Designed specifically for the performance enthusiast. Iridium IX offers extreme ignitability, improved throttle response and superior anti fouling. Fine Iridium tip ensures high durability and a consistently stable spark. Iridium alloy has extremely high melting point, perfect for today 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. Heat Grade 7.
These BKR8EIX plugs are recommended for WRX with upgraded turbochargers making in excess of 150hp over stock. Sold individually, buy 4 for a complete set.