This tapered washer is used for retaining manifolds on 84-99 XJ, 84-87 SJ, 86-92 MJ, 93-98 ZJ, 99 WJ and 84-99 CJ / YJ and TJ with either 2.5, 4.0 and 4.2 liter engines. These are factory surplus parts so they fit as original did. Replaces OE# 33004255