Yes you have to remove the upper intake manifold. I reused both the MLS gaskets on the upper intake and manifold spacer without any issues. I also reused the rubber seal on the upper intake manifold cover. As long as there are no visible cracks, or deformation in these gaskets, I see no issues with them being reused.
As well as the cylinder head cover gaskets. For piece of mind you could just get the two MLS gaskets that go between the upper intake ---- manifold spacer and ---- lower intake runners.
There is no need to remove the lower intake runners.
As well as the cylinder head cover gaskets. For piece of mind you could just get the two MLS gaskets that go between the upper intake ---- manifold spacer and ---- lower intake runners.
There is no need to remove the lower intake runners.