Subaru Air-Oil Separators have billet aluminum bodies with internal baffling and mesh media. The Air-Oil Separator Kits are plumbed into a vehicle's PCV system to capture the excess crankcase vapors, residual oil mist and moisture from re-entering the intake tract. This allows for an increase in engine performance from cleaner intake air. Most applications are available in large or small body and black anodized finish or polished. With a two piece body, the draining of the collected oil is virtually mess-free. Don't happen to see what your looking for-call 855-HPD-RACE to talk to one of our experienced representatives.