Most modern aftermarket rims are made with an oversize center bore and the centering ring brings that bore size down to the RX8 fitment of 67.1 mm. If you have a 2006 or newer RX8, these help to properly fit your new alloys. Price is for set of FOUR ALUMINUM rings with retaining clips...designed only for certain Enkei wheels that are machined for that retaining clip and these rings. This 75mm size is used for the Enkei RS+M and GTC01 wheels.
Brian's Tips: Grab your Anti-Seize and use a smear all sides of the METAL ring or it will seize eventually on track cars to the wheel or the hub.