Refresh your ignition system in one shot with APR Iridium Pro Spark Plugs and pair with APR Ignition Coils – engineered to work together for a stronger, more consistent spark. Each is a direct-fit upgrade designed to support smoother idle, sharper throttle response, and reliable performance under heat and load—whether you’re stock or running higher boost and power upgrades. Features and Benefits Heat range 9 spark plug (Similar: Bosch 3, Brisk 10, Denso 27, and NGK 9) 152% higher melting point than silver, 125% higher than copper, and 38% higher than platinum. Stronger than copper and platinum Designed for high performance / tuned vehicle applications Non-projected insulator design Lower required supplied voltage Cooler operating temperature than stock plugs Optimized electrode design for hard to ignite fuels, such as ethanol Resists preignition better than stock plugs Perfect for upgraded APR vehicles An excellent match for APR ignition coils Thread reach: 26.5mm Thread diameter: 14mm Hexagon: 16mm Seat Type: Gasket Install Torque: 25 Nm Made in the EU
