The NGK SILMAR9A9S Laser Iridium High Ignitability spark plug is a replacement plug for 2009-2020 Honda models. It has M10-1.0 threads, a 1.043 in. reach, a 14 mm hex and a heat range of 9. An iridium alloy center electrode paired with a fine platinum ground electrode tip supports more complete combustion and smoother idle.

NGK SILMAR9A9S Laser Iridium High Ignitability Spark Plug Features:

• Fits 2009-2020 Honda models; see Fitment tab for all applications
• M10-1.0 metric thread with 1.043 in. reach
• 14 mm hex
• Flat seat with crush washer installed
• Heat range 9
• 0.036 in. factory pre-gap
• Iridium center electrode tip with platinum ground electrode tip
• Resistor type (5000 ohm) for ignition noise suppression
• Non-removable nut terminal
• 2.010 in. insulator height
• High ignitability design pairs an iridium alloy center electrode with a fine platinum ground electrode tip
• Fine ground electrode tip supports more complete combustion, smoother idle and quicker throttle response
• Copper core center electrode draws heat away from the firing end
• Trivalent metal plating resists corrosion and thread seizing
• Intended for engines that originally used high ignitability iridium plugs
• Sold individually