Subaru PCV Valve 2009-2014 WRX

The Positive Crankcase Ventilation (PCV) valve keeps crankcase gases 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 2009-2014 WRX. Also fits 2010-2013 Forester XT