H&R wheel spacer set with bolt pattern 5/130 center bore 71.6 stud / 14x1.5 thread . Fixed Studs are included. Extended wheel bolts are sold seperately. Two sets needed per car. Widens vehicle stance resulting in a lower roll center, increased lateral stability, and improved handling made of a proprietary aluminum/magnesium alloy. Hard Anodized to ensure a tough finish.