All of our new parts are aftermarket replacements. Compatible with Case Tractor(s) 430, 440, 470, 530, 540, 570, 630, 640. Compatible with Case Skid Steer Loader(s) 1740, 1835, 1835B, 1845, 1845B, 1845S. Compatible with Case Construction & Industrial(s) W3, W5, W5A, W11, 310D, 310E, 310F, 310G, 320, 350, 350B, 420, 420B, 420C, 430, 450, 450B, 455B, 480, 480B, 480C, 480D, 580, 580B, 580C, 580D, 584C, 584D, 585C, 585D, 586C, 586D. Compatible with Case Engine(s) D188, D207. Contains all gaskets necessary for a complete engine overhaul. All States Ag Parts Item No.