This Vq35 Crankshaft is made of polished steel and is a genuine OEM Nissan/Infiniti part with the OE/OEM Part Number MKCH011001. It fits 3.5L Vq35de engines in 2003-2006 350Z/G35 as well as 2004-2008 Maxima/Murano/Altima models. The crankshaft is made in Japan and is designed to provide optimal performance for your vehicle. The package includes only the crankshaft.