Single valve cover. Can send more pictures if interested. The 1957 Chrysler HEMI Dual Quad IMPERIAL Valve Cover is a high-performance parts made in the United States by Chrysler. These valve covers are designed specifically for the HEMI engine, known for its powerful performance and racing capabilities. Featuring the iconic Chrysler brand, these valve covers are a must-have for enthusiasts looking to enhance the performance of their classic 1957 Chrysler vehicle, whether for street driving or racing applications.