Notes: 158552-51780 SPRING is original YANMAR product. 158552-51780 SPRING5 is commonly used in transmissions/axles/engines 4TNV94L-PIKA, 4TNV94L-PIK, 4TNV94L-NCKS, 4TNV94L-NCKM, 4TNV98-YTBL, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849