Hi everyone, Here is the quick description on how to take the intake manifold off as the haynes manual sucks and has little bit infor on 3.0 V6 model. Mitsubithisi Eclipse 3.0 V6 manual has much more information regarding this engine.

There are 5 bolt that hold manifold at the front section 2 long once at the middle and three medium size at the root, also there are two nuts on each side where the upper and lower intake at meet together(upper intake manifold and lower intake) those bolts are 12 mm size and there is a bracket that is on the left side hold by two bolt 14mm each one is behind the coolant bucket. The intake manifold is also secured from the back and there are five 12 mm bolts. The first three are easy to find they are located on the passenger side, two of the bolts holding the egr pipe line and the other one is just to the left of the pipe. The forth bolt is located in the middle of the back side of the manifold, its easiest to reach from egr pipe line area(passenger side). The fifth bolt is located behind throttle body, its not necessary to remove throttle body there are planty room to work with.