Exedium Diff Collars for S2000Exedium Racing Differential Mount Collar Kit Honda S2000 (19992009) The Exedium Racing Differential Mount Collar Kit for the Honda S2000 is designed to reduce drivetrain flex caused by the factory rubber bushings. These precision CNC machined billet aluminum collars install directly onto the differential mounts to limit unwanted movement, resulting in improved stability and more efficient power transfer. By minimizing differential flex, this kit helps