Notes: 144179 BEAM SA 20.29/20.43S (121 is original CARRARO product. 144179 BEAM SA 20.29/20.43S (1215 is commonly used in transmissions/axles/engines 142254, 144612, 144809, 147914, 147916, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849