This is a A-AR55827 Voltage Regulator PN: AR55827Main Description As Following : A-AR55827 Voltage Regulator P.N: AR55827 Used w/ Delco System Stocked As: A-NR-161 , Crossed From: TP-AR55827 , Found in Section & Models : Tractor Parts Associated Items : New Also This is An Aftermarket Product And : High Quality Afternaket Shipped from Both US and Canada