Subaru PCV Valve 2015-2021 WRX

The Positive Crankcase Ventilation (PCV) valve keeps crankcase gasses from building up inside your valve covers, while keeping foreign stuff out. This inexpensive part is important! A broken or clogged PCV can cause excess blow-by or blown seals from too much crankcase pressure.  

Fits:

2015-2021 WRX

2014-2018 Forester XT