COBB Spark Plugs EJ25 2004-2021 WRX, STI, Legacy, Forester, Outback | D44700 Control Arms forcing air from the crankcase

forcing air from the crankcase through a swirl pot and series of baffles that promote heavier oil particles in the blowby vapor to condense and collect as a liquid at the base of the canister

Quantity 4 is required for a full set

3" double-wall polished tips

Part #: 50305

allowing most components to mount directly over original trim pieces

COBB Spark Plugs EJ25 2004-2021 WRX, STI, Legacy, Forester, Outback | D44700 Control Arms forcing air from the crankcaseFitment Information: Subaru STI 2004 2021 Subaru WRX 2006 2014 Subaru Legcacy GT 2005 2009 Subaru Forester XT 2004 2013 Subaru Outback XT 2005 2009 This is the factory spark plug as installed in the 2018 Subaru WRX STI Type RA and 2019 Subaru WRX STI. The main differences are a heat range that is one step cooler as well as a slightly tighter gap than previous factory spark plugs. These serve as a factory replacement for the 2018 STI Type RA and 2019