HEMI Air Oil Separators

Air Oil Separators (Catch Cans) are designed to remove blow by oil in your PCV system before the air is reintroduced to your intake manifold. The reason that Air Oil Separators are so important is because allowing oil vapors to reach your cylinders can reduce combustion, a loss of power, and fouled spark plugs. As you increase performance the effects of blow by gas will become more noticeable.