Elbow Radiator Lower 561.75548 F50-1548, Coolant Poly Reinforced 4Ply 45Deg Elbow, T660, T680, T800, T880, 387, 388, 389, 579, 587, Kenworth T800, 387, 389, T680, Peterbilt 388, T660, 579, 587, T880