NISMO Diff Mount Stopper Bush, Lower For Skyline GT-R (BNR34) RB26DETT 55475-RS580Brand NISMO Series Name Diff Mount Stopper Bush, Lower Product Descriptions Qty to order per car : 2 For 55401 RS 590, used in set No. 17, 18 no need for press fitting Product Number 55475 RS580 Compatible Vehicle Skyline GT R (BNR34) Engine RB26DETT Remark No. : 18 Both the link and the bush must be replaced at the same time. If only one side is exchanged, the balance of the left and right suspension collapses, so please exchange at the same time