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Drilling Rivets

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The PCV valve is in the rear of the manifold above the cam and lifters where it can suck up hot oil. The factory devised this oil shield that’s riveted to the bottom of the stock intake manifold. You’ll want to drill out the rivets and transfer the shield to the Performer manifold. Otherwise, the PCV can pull oil into the intake charge resulting in low oil levels and possibly fouled plugs.