[tekenaar]

For reference, here is a photo of a 2.4 Opel exhaust manifold. Compared to the typical Sprint manifold, it has larger runners, a larger collector flange, and has the outlet flange located further back than a 1.9's.

Further back AND turned 90°. Center exhausts are still siamesed? and there is a O² sensor boss at the flange. Got another one, Bob?