Spark Plug NGK IFR7X7G (91039)

The NGK 91039 (IFR7X7G) premium Iridium spark plug is a high-tech solution for modern gasoline engines requiring maximum ignition reliability. The ultra-fine Iridium-tipped center electrode features an extremely high melting point and exceptional wear resistance, maintaining a consistent spark gap throughout its service life. A platinum chip on the ground electrode further extends the lifespan by preventing metal erosion. Due to its low required ignition voltage, this model ensures instantaneous combustion of the fuel-air mixture, improving throttle response and reducing harmful emissions. The IFR7X7G is optimized for high-temperature and high-pressure environments typical of turbocharged and high-performance engines (specifically for various Opel and Chevrolet models). The use of NGK Iridium technology guarantees fuel efficiency and maintenance-free ignition performance for up to 100,000 km.