This Wilwood 12-lug Dynamic lug-drive rotor hat specifies a 7.77" snap-ring interface used to retain rotors in multi-piece assemblies. The hat provides the mounting interface for compatible rotors that use a 7.77" internal clip, so double-check the snap diameter and lug spacing against your rotor and hub to ensure proper fit and secure rotor attachment during installation.
Wilwood 12 Lug Drive Dynamic MT Hat 7.77 Snap