GrimmSpeed Air Oil Separator Black WRX (2002-2007) STI (2004-2018) Volkswagen The modular design of the

The modular design of the XS platform allows you to change both the inlet and the outlet of the valve

NEUSPEED P-FLO Kit including filter:

6mm wall thickness

The Perrin Master Cylinder Brace for the Subaru BRZ/Scoin FR-S eliminates the flex at the firewall

GrimmSpeed Air Oil Separator Black WRX (2002-2007) STI (2004-2018) Volkswagen The modular design of theGrimmSpeed has a unique design for the Subaru WRX, STI and Legacy GT which allows you to keep your PCV valve while separating the oil out of the crankcase and head ventilation air. None of the other competitors on the market are able to vent both. The unit is very compact and efficient, it bolts directly on to the factory oil cap location. You will no longer have to keep tabs on your oil level and or empty the catch can like on most standard cans as