Edelbrock factory style 15% overdrive damper for the Ford 5.0L Coyote engine. It features a 7.75in. diameter 8-rib design that delivers maximum traction and stability in supercharged applications. Can also be used with 6-rib applications (2 ribs will not be used). It's an ideal solution for any supercharged application where a smaller pulley is not an option. This is the same damper used on Edelbrock Coyote crate engines. This damper is SFI approved and recommended for supercharged applications only.