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Old 08-30-2009, 05:39 PM   #2
PsyDoc
 
Drives: Soon-to-be 1st Gen
Join Date: Nov 2008
Location: Southeast
Posts: 249
Are you talking about a oil-air separator or "catch can"? If so, then they are beneficial as they catch any oil blow-by and other stuff and keeps it out of your intake and throttle body.
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