Wilwood's 12-lug Dynamic lug-drive rotor hat is specified with a 7.77" snap-ring interface for rotor retention. As the hat component of a multi-piece rotor system, it provides the correct mounting interface for compatible rotors that use a 7.77" internal clip. Verify that the snap diameter and lug configuration match your rotor and hub to ensure proper installation and secure rotor mounting.
Wilwood 12 Lug Drive Dynamic MT Hat 7.77 Snap