Improved throttle response, superior anti-fouling and high-ignitability makes iridium ideal for the performance enthusiast. Iridium’s extremely high melting point is perfectly suited to today’s high-temperature engines, delivering outstanding acceleration, fuel efficiency and durability.
- Fine iridium tip ensures high durability and a consistently stable spark
- Trivalent metal plating for superior anti-corrosion and anti-seizing properties
- Outstanding acceleration, high fuel efficiency and durability
These NGK iridium-tipped spark plugs come pre-gapped to 0.031″ (stock heat range), or 0.024″ (colder heat range).
Set of four spark plugs.
Available in stock heat range, or one range colder for high boost (18+ psi) and/or race applications.
Product packaging and appearance may vary.
Fits all EJ25 turbo motors, including 2006-2014 Subaru WRX and all 2004+ STI (including 2015+). The one-range-colder plugs are factory-issue on the 2019+ STI.
