These are hands-down the highest quality valve covers available today. They are made with pride in the USA and feature die-cast aluminum construction with integrated heat-sink fins for years of lasting performance. The authentic design of these valve covers has squared-off bolt access ports modeled after the original cast valve Shelby covers from the '60s. They also feature Scott Drake's low-profile baffles providing maximum clearance for high lift cams and most aftermarket roller rocker arms. Spark plug wire loom brackets and PCV grommet are included. Sold as a pair. Will not fit EFI engines.