Brake Hub Register Interfernce
 

The brake hub register shown in the picture represents a step for an OEM 12-Bolt drum brake assembly (2.810"/2.775") (10-Bolt drum applications are 2.775" w/o step). The Wilwood parking brake kits require a hub of 2.780". If you are purchasing "off the shelf" direct replacment 12-Bolt axles from Moser or through a Moser Distributor then this hub will always be to OEM specifications. This problem would also present itself if using your original OEM axles with said kit. If you custom order these axles from Moser and specify for use with a Wilwood kit Moser will turn the hub accordingly at no additional charge.