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These NGK iridium-tipped spark plugs are exactly the same specification, and the same manufacturer, as the factory Subaru spark plug. They cost less because they don't have the Subaru name on them. (If you're looking for the Subaru-branded plugs, we have those, too.)
Tech note: The stock spark plug gap specified by Subaru on the FA20 turbo motor is 0.020"-0.022", or 0.05mm to 0.055mm. The gap on these NGK plugs is pre-set to 0.024"/0.6mm. We find that this gap still works fine, but if you want you can gap them down to factory specification by very carefully and gently adjusting the ground strap. Just be aware that the iridium electrode on these is extremely fine and brittle -- you break it even if you barely touch it with a gap tool. We will NOT accept warranty returns for broken electrodes.
Set of four spark plugs.
Fits all 2015-2021 Subaru WRX and 2014-2018 Forester XT.
