Main Bearings STD - 4226953M91 Models 2CX, 3425, 3435, 3445, 3455, 533-105, 535-140, 535-95, 540-140, 540-170, 5410, 5420, 5425, 5430, 5435, 5440, 5445, 5450, 5455, 5460, 6445, 6455, 6460, 6470, 528-70, 528s, 412S, 524-50, 527-55, 535-125