NGK Iridium IX Spark Plugs (CR9EIX) - Set of 4, Screw Type, Stock No. 5448

A new thrill born from quick response! High-performance spark plugs that unleash the power of your beloved vehicle! [No. 1] Improved starting and acceleration: Add a premium touch to your vehicle. Your machine roars the moment you step on the accelerator. This quick response will bring you a new level of driving pleasure! [No. 2] Improved fuel economy: Outstanding fuel efficiency. Kind to your wallet and the environment. Iridium plugs have better ignition than standard plugs, achieving outstanding fuel efficiency! [No. 3] High-performance Iridium IX plugs spark new territory in your engine! Iridium IX is an iridium plug that can be used to replace standard heat value plugs (fitted on original equipment). Compared to standard plugs, combustion spreads faster, and a thermo edge at the tip of the insulator improves plug fouling. This high-value plug improves ignition, acceleration, and fuel economy. <Heat value> 9