Notes: 171085-21451 HOUSING, BEARING is original YANMAR product. 171085-21451 HOUSING, BEARING4 is commonly used in transmissions/axles/engines 4TNE98-SA, 4TNE98-G1A, 4TNE94-SA, 4TNE94-G1A, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849