NGK Iridium IX spark plugs are a top choice for performance lovers. They offer amazing acceleration, great fuel efficiency, and long - lasting durability. These plugs have extreme ignitability and excellent anti - fouling properties. The tapered cut ground electrode improves starting, idling, and throttle response. The Iridium fine wire center electrode is six times harder than platinum, and its high melting point alloy is ideal for modern engines. For even better performance, you can upgrade to an NGK Ruthenium HX plug. This part fits various models including 2006 Mitsubishi Lancer Evolution series and 2014 - 2016 Yamaha WaveRunner models like FX Cruiser SVHO, FZR, and FZS.

Using these NGK Iridium Spark Plugs is easy. First, make sure your engine is cool. Then, carefully remove the old spark plugs and replace them with these new ones. Tighten them just right - not too loose or too tight. When it comes to maintenance, it's a good idea to check the spark plugs regularly, about every few months or as recommended in your vehicle's manual. If you notice any signs of wear or fouling, it might be time to replace them. Also, always keep the engine clean to help the spark plugs work at their best. And remember, if you want even better performance, you can think about upgrading to the NGK Ruthenium HX plugs later.