FYI Nismo heads were just raw head castings. In other words, you can't use them until you have it ported and seated. They are basically your normal VG30E heads but with no work done to them...they were useful because they had more meat to them and you can grind it for specific applications. If you want narrow small ports...there you go! If you want bigger ports, just port them out. Thats what VG NISMO heads were all about.