NGK Iridium Spark Plugs (Set of 4)
Four NGK Iridium IX Spark Plugs for all 2013 - 2018 Focus STs, 2016 - 2018 Focus RSs and 2014-2019 Fiesta ST. These Spark plugs also work on many other Ford Ecoboost and Mazdaspeed engines.
These spark plugs are designed specifically for the performance enthusiast so they are perfect for lots of upgrades and high boost applications. Iridium alloy is used providing an extremely high melting point that is ideal for these high-tech, high performance engines.
Using spark plugs that are optimized for increased power insures maximum performance. The NGK LTR71X-II is one step colder than the original spark plug and perfect for those running additional boost pressure and typical bolt-on modifications.
Features:
- Fine Iridium Tip Has High Durability and a Consistently Stable Spark
- Extremely High Melting Point- Smoother Idle
- Outstanding Acceleration, High Fuel Efficiency and Durability
- Heat Range -1 Colder Than Factory Plugs