Notes: 26013-080552 BOLT, SPRING M8X 55 is original YANMAR product. 26013-080552 BOLT, SPRING M8X 554 is commonly used in transmissions/axles/engines 4TNE98-HYS, 4TNE98-NSR, 4TNE98-NSR, 4TNE98-HYS, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849