The NGK 2667 Iridium IX spark plug is a replacement plug for 1991-2021 Polaris, Audi, Volkswagen and other makes. It has M14-1.25 threads, a 0.750 in. reach, a 5/8 in. (16 mm) hex and a heat range of 7. A fine wire iridium center electrode and tapered-cut ground electrode deliver strong ignitability and anti-fouling for performance and modified engines.

NGK 2667 Iridium IX Spark Plug Features:

• Fits 1991-2021 Polaris, Audi, Volkswagen and Other Makes; see Fitment tab for all applications
• M14-1.25 metric thread with 0.750 in. reach
• 5/8 in. (16 mm) hex
• Flat seat with crush washer installed
• Heat range 7
• 0.032 in. factory pre-gap
• Iridium center electrode tip with nickel ground electrode tip
• Resistor type (5000 ohm) for ignition noise suppression
• Non-removable nut terminal
• 1.990 in. insulator height
• Fine wire 0.6 mm iridium center electrode tip for strong, stable spark and anti-fouling
• Tapered-cut ground electrode reduces flame quenching for improved starting, idle and throttle response
• Copper core center electrode draws heat away from the firing end
• Trivalent metal plating resists corrosion and thread seizing
• Suited to modified and high performance engines or as an upgrade from nickel alloy plugs
• Sold individually