On most vehicles it will be a cast alluminum, that will be machined accordingly.
cast iron
exhaust or inlet manifold?inlet distributes fuel to all cylandersehaust collects gases from all cylanders and directs to one out let
replace the water heater inlet pipe on the intake manifold on a 3800
underneath the inlet manifold.
On the 12 valve engine it is positioned underneath the inlet manifold at the gearbox end to replace I found it easier to remove the inlet manifold after wasting time trying to do it with the manifold in place.
Intake or inlet manifold has nothing to do with the heating of the car. Newaz.
Inlet or Exhaust?
the alternator is located under the inlet manifold
if you mean firing order , it is written on the inlet manifold
air leak to inlet manifold check small hoses the back of the inlet manifold if the hose is blocked with carbon clean it or replace and clean crankcase breather all of it.
open the bonnet, alloy part bolted to the R/H side of engine is the inlet manifold. NOTE: IF you need to ask this question do not attempt any maintenence yourself.
inlet manifold about halfway down