It looks like the Nissan rb20/25 exhaust manifold may work on my Mercedes I6 with some modifications. Before I pull the trigger on a new manifold I want to see if anyone could give me rough port spacing and general dimension measurements, cad drawing, or at least an old exhaust gasket. This is for an om603/om606 turbo diesel. The 606 ould require welding in a new flange, but the 603 just may work with new holes. My 300cd currently has a om603 swapped in but I sold the factory turbo and manifold off of it.
