Ruthenium HX Spark Plug

Each plug features a 0.4mm ruthenium fine wire center electrode, which requires less voltage to create a spark compared to thicker electrodes, leading to improved combustion, smoother acceleration, and better fuel economy. This design is especially beneficial for turbocharged engines that place higher demands on ignition systems. These plugs utilize a 0.4mm ruthenium center electrode and a 0.8mm platinum ground electrode, materials chosen for their extreme hardness and wear resistance. This construction ensures significantly longer life and slower erosion rates compared to standard copper or iridium plugs, with a mileage rating of up to 120,000 miles under normal driving. The trivalent metal plating on the threads prevents seizing in aluminum cylinder heads, ensuring easier removal after long service intervals. NGK Ruthenium HX spark plugs come pre-gapped at 0.031 inch (0.8mm), the factory specification for many compatible engines, and are designed to be installed without re-gapping. Proper installation requires torquing them to 13 lb-ft to avoid damaging the ceramic insulator. The heat range is set at 8, which is suitable for stock K20C and L15B motors, as well as those with mild modifications like intake and exhaust systems. For significantly modified engines with larger turbos, higher boost levels, or E85 fuel, consulting a tuner about a colder heat range (7 or 6) is recommended. This set is specifically designed for a range of Honda and Acura vehicles, including the 2017-2026 Honda Civic Si, 2017-2026 Honda Civic Type R, 2023-2026 Acura Integra (A-Spec and Type S), 2021-2026 Acura TLX 2.0T, 2019-2026 Acura RDX, and 2018-2022 Honda Accord 2.0T. If tracking your vehicle or running higher boost, it is advisable to check the plugs every 20,000-30,000 miles to monitor electrode wear and insulator tip color for optimal performance.