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Message: <blockquote data-quote="INW-Iron-Steel" data-source="post: 27604" data-attributes="member: 11733"><p>Is this on a stock application or turbo/FI? On a turbo application I would definitely consider a catch can if retaining PCV. On a stock or mild NA build I would not consider a catch can necessary. Are you trying to solve an oil consumption problem? I know early LS applications suffered from excessive oil consumption and oil in the intake. The culprit was said to be the PCV valve. GM released an updated one, the "fixed orifice" valve. After that the PCV was integrated into the valve cover.</p></blockquote><p></p>