Also, could you guys confirm that this is a D15Z1? I have always told them apart by the oil cap on the top corner, the spark plug location, and the valve cover. So to me this seems to fit, but I want to be sure, and I have asked the seller about engine code, but waiting to here back.
... And yes I would probably switch the header to a manifold if I were to buy this.
Edit: maybe I should add the pic,