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I have a catch can on my Firebird. It has a strong tendency to suck oil out the PCV valve which runs straight into the intake manifold. This is especially important on that car since the engine has a CR of 10.4/1, and oil mixing in with the air fuel mixture will lower the octane level. I made mine out of an inline air compressor filter, some fuel line hose and some plumbing fittings.
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