Moroso air/oil separator catch can for 2004–2007 Subaru WRX STi with a front-mount intercooler is a billet aluminum unit that separates oil and crankcase vapors from intake air to reduce contamination. Specified for these STi years, the small-body machined housing offers a compact, direct-fit option to capture oil and vapor before they enter the intake and intercooler passages.
Moroso 04-07 Subaru STi (w/Front Mount Intercooler) Air/Oil Separator Catch Can - Billet Aluminum