Iridium IX® The Spark Plug Serious Enthusiasts Rely On 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’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. NGK SR20DET IX Iridium SPARK PLUG MSRP: $20.64 MTR sale price: $15.27 Thank you for shopping Manic Tech Racing.