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Old 01-05-2018, 08:56 AM   #6
JeromeS13

 
Drives: 2017 1SS/1LE
Join Date: Sep 2016
Location: FL Panhandle
Posts: 1,559
They're designed to "fill the gap" between the hub bore and the wheel's center bore. If they do not sit snuggly inside of the wheel, then they're the wrong side. They're usually marked with the diameters (in mm).
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