A.I.R. and E.G.R. delete
The big one is for the EGR valve itself on the driver side back of the intake manifold. The long one is the hole next to it on the pass side and the littlest one looks to be the hole on the exhaust manifold itself.
If yours is anything like mine, after removing the AIR, my car idles smooth as silk. See sig for the answer to the cam
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