This Zeki Turbo T1597-01 is a direct replacement equivalent to the IHI RHF4 Turbo. Application for New Holland, Yanmar, Perkins 404C-22T, 404D-22, Cat 247 series 3024C C2.2T, Terex loaders, ASV, TC55DA, SHIBAURA Tractor ST445, N844L, N844LT engines. Corresponding part numbers include: AS12, VB420081, 238-9349, 13575-6180.