NGK IFR6J11 7658 Spark Plug Iridium

Experience dependable ignition with the NGK IFR6J11 7658 Iridium spark plug. Engineered for precision, this 14mm diameter plug features a fine iridium center electrode and a robust sealing design that resists fouling and wear. The advanced center electrode reduces voltage demand while delivering a stable spark, improving cold starts, throttle response, and overall efficiency. Suitable for a wide range of modern engines, the IFR6J11 provides consistent performance in both daily commuting and spirited driving. Its durable construction enhances longevity, helping to lower maintenance costs and keep engines running smoothly under demanding conditions. Installers appreciate the plug’s standardized reach, reliable gap retention, and compatibility with both OEM and performance applications.