Caterpillar, 450E, Backhoe, Loader, Radiator (278-3523, 2783523, 273-3137, 2733137, 266-0149, 2660149, 361-6073, 3616073, 254-0150, 2540150, MN222000-18923C, MN22200018923C, MN422133-8472, MN4221338472) Core: Core: 28 5/8 x 20 x 4 1/4, All Aluminum unit replaces the Plastic tank OEM unit