NGK Spark Plugs 2006-2014 WRX, 2004-2021 STI

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

There are two heat ranges. The 6 heat range plugs were standard-issue on 2006-2014 WRX and 2004-2018 WRX STI. Subaru changed to the 7 heat range plug for the 2019-2021 WRX STI. You might want to use the 7 range plug for an older car as well, especially if it is making substantially more power than stock.

These NGK iridium-tipped spark plugs come pre-gapped to 0.031" (6 heat range), or 0.024" (7 heat range).

Set of four spark plugs.

Product packaging and appearance may vary.

Fits all EJ25 turbo motors, including 2006-2014 Subaru WRX and all 2004-2021 WRX STI.