NGK ILNAR8B7G / 91970 Laser Iridium Spark Plug Replaces 55490097

The NGK ILNAR8B7G / 91970 Laser Iridium Spark Plug delivers top-tier ignition performance with the smallest tip diameter for rapid, reliable starts. Its laser-welded iridium center electrode and trivalent metal plating provide exceptional wear resistance, promoting stable idle, minimal fouling, and longer service life. With a 14 mm spanner size, 25.0 mm thread length, and 5 kOhm interference suppression, this OEM-approved plug reduces misfires, improves acceleration, and enhances fuel economy while lowering emissions. Engineered for longevity, it maintains consistent performance across varied driving conditions. If you’re unsure about compatibility, consult the cross-reference table or reach out for guidance to ensure the right fit for your vehicle.