GrimmSpeed Air Oil Separator Red WRX (2008-2014) LGT (2005-2012) Nissan Because the catted downpipe uses

Because the catted downpipe uses a very high flowing catalytic converter

By reducing the amount of oil that is entering the intercooler and intake system you will have a cleaner more efficient motor and less engine damaging detonation

50% vent system that retains the return tube

The Brass Plus material with its alloy backing matched to a performance pressure plate will provide smooth engagement and extended life

- Polished SUS304 construction

GrimmSpeed Air Oil Separator Red WRX (2008-2014) LGT (2005-2012) Nissan Because the catted downpipe usesGrimmSpeed 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