I don't think it's a Mangolesti manifold either, the Mangolesti has a slight curve to the runners and 2 square boss's, one at either end, to mount a linkage onto the one in the pic appears to have straight-ish runners and 3 round boss's for linkage mountings and, as oldhemi says, the casting web inbetween the runners is different, the Mangoletsi's I've seen all have something like 04700 or 470 cast into them somewhere too.