Wilwood supplies this 12-lug Dynamic lug-drive rotor hat with an 8.80" snap-ring interface, intended as the hat component in a two-piece rotor system. The listed snap size identifies the internal retention diameter used with compatible rotors, so confirming the 8.80" clip interface and lug arrangement against your rotor and hub is necessary to ensure a correct match and reliable mounting.
Wilwood 12 Lug Drive Dynamic MT Hat 8.80 Snap