COBB Spark Plugs EJ25 2004-2021 WRX, STI, Legacy, Forester, Outback | D44700 Miata_2006-2014 Part #: NSK1000-SS-X

Part #: NSK1000-SS-X

while having more stability on higher speed levels

Test fitting required before final installation

Burnt Stainless Steel 4" inch Slant Tip Design

-Fuel Filter (-01 Cellulose

COBB Spark Plugs EJ25 2004-2021 WRX, STI, Legacy, Forester, Outback | D44700 Miata_2006-2014 Part #: NSK1000-SS-XFitment 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