Spark Plugs

IAG Performance carries spark plugs for Subaru EJ and FA engines, including OEM and NGK options, an essential maintenance item for keeping your WRX, STI, BRZ, Legacy GT, or Forester XT running smoothly. The right spark plug gap and heat range matters even more as boost levels increase, since plugs that run too hot or too cold can lead to misfires or detonation under load. Replacing plugs at the recommended interval helps protect your engine and maintain consistent power delivery.