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This Wilwood lug-drive rotor hat specifies a 7.77" snap-ring interface and lists 4.50/4.75 bolt circle options, indicating flexibility for different hub patterns. As the hat piece in a multi-part rotor assembly, it defines the retention and mounting geometry for compatible rotors. Confirm the 7.77" snap diameter and chosen 4.50 or 4.75 bolt circle to ensure the hat matches your rotor and hub configuration before installation.
Wilwood 7.77 Snap Ring Lug Drive Hat 4.50/4.75
