These spark plugs are designed specifically for the performance enthusiast so they are perfect for the 2013-2017 Focus ST or 2016-2017 Focus RS that has lots of upgrades and high boost applications installed. Iridium alloy is used in these great new spark plugs providing an extremely high melting point that is ideal for the high-tech, high performance engine in your 2013-2017 Focus ST or 2016-2017 Focus RS.
- Fine Iridium Tip Has High Durability and a Consistently Stable Spark
- Extremely High Melting Point
- Trivalent Metal Plating
- Superior Anti-Corrosion and Anti-Seizing Properties
- Outstanding Acceleration, High Fuel Efficiency and Durability
- Ultimate Design, Technology and Performance
- Heat Range -1 Colder Than Factory Plugs
This set of four Iridium IX Spark Plugs from NGK Spark Plugs fits all 2013-2017 Focus STs and 2016-2017 Focus RSs and is perfect for high boost applications. These plugs have superior anti-corrosion properties and a higher melting point than the original stock plugs do. If you want a cooler spark plug that is durable and delivers a consistent, reliable spark, then look no further than this set from NGK Spark Plugs. These spark plugs offer extreme ignitability, improved throttle response and superior anti fouling, all great and welcome benefits for improving the function of your 2013, 2014, 2015, 2016 or 2017 Focus ST s or 2016-2017 Focus RS's engine and all around performance!
NGK Spark Plugs is known for their numerous contributions to the spark plug market, including the development of copper core spark plugs, new ceramic technology and the development of iridium spark plugs like these. NGK Spark Plugs also developed the V-Groove spark plug, which is an ideal product for today's clean burning, low emissions engines.