Wilwood's 12-lug Dynamic lug-drive rotor hat notes an 8.80" snap interface and functions as the hat in a multi-piece rotor system. It defines the retention geometry for rotors that accept an 8.80" internal clip, making that snap diameter a critical specification for compatibility. Verify snap size and lug arrangement with your rotor and hub prior to ordering to ensure correct assembly.
Wilwood 12 Lug Drive Dynamic MT Hat 8.80 Snap