This HONDA STD Piston is a genuine OEM part numbered #13101-921-020, designed for pre-1997 B75 K1 K2 K3 outboard motors. This vintage part is a must-have for any Honda outboard motor enthusiast. It is in new old stock (NOS) condition and has not been used before. This piston is perfect for replacing worn-out or damaged pistons in your Honda outboard motor. With its high-quality construction and reliable performance, it will surely enhance the overall performance of your motor. Don't miss out on this rare find!