The Elring Head Gasket Installation Kit - 521680 is a must-have for any DIY mechanic. This kit includes all the necessary components to install a new head gasket on your vehicle. It includes a new head gasket, head bolt washers, head bolt nuts, and cylinder head gasket sealant. All components are designed to meet or exceed OE specifications. The kit also includes detailed instructions to ensure proper installation. With the Elring Head Gasket Installation Kit - 521680, you can easily and quickly replace your head gasket and get back on the road.