This is a genuine Mazda Exhuast Stud with the part number PY90-40-584A. It is compatible with most Mazda vehicles and is made of high-quality steel material. The stud is designed for use as an Exhuast Manifold Stud, and it comes with a screw-on mounting style for easy installation.The stud is gray in color and has a universal fitment, making it a perfect replacement part for your vehicle. It is manufactured in Japan and is an OE/OEM part with the same part number PY90-40-584A. This Exhuast Stud is a bare part and does not come with any additional items.