Maintenance Items COBB Tuning | Subaru 2.5L Spark Plugs Wrx, Sti, Legacy Gt, Forester Xt

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 Sti And A Great Upgrade For Modified 2.5L Turbocharged Subarus.