Wilwood rotor/hat register rings, 2.82-inch diameter, come as a two-pack to help center rotors on hats or hubs for correct rotor alignment. These rings allow aftermarket rotors to register properly on a hub surface, improving concentricity and reducing the potential for vibration. They are intended for use during rotor upgrades or conversions where register diameters differ between components.

Wilwood Adapter Rotor/Hat Register Ring 2.82in Dia. - 2 Pack