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The NGK 6619 Iridium IX Spark Plug (LFR6AIX-11) is built for high-performance and long-life ignition in modern engines. Featuring a fine-wire iridium center electrode and tapered ground electrode, it ensures consistent combustion, quicker starts, improved throttle response, and extended durability under demanding driving conditions.
🔧 Iridium tip provides exceptional longevity and spark stability
🔧 Fine-wire design improves ignitability and fuel efficiency
🔧 Tapered ground electrode minimizes quenching for better combustion
🔧 Pre-gapped at 1.1mm for fast, OE-style installation
Brand & Part Number: NGK 6619 (LFR6AIX-11)
Material: Iridium
Thread Size: 14mm
Reach: 25mm (0.98 in)
Hex Size: 5/8 in (16mm)
Heat Range: 6
Seat Type: Gasket
Resistor: Yes
Gap: 1.1mm (0.043 in)
Choose NGK LFR6AIX-11 Iridium IX for reliable ignition, smoother performance, and extended plug life in today’s advanced engines—order now!