The Shibaura 120166240 is a genuine OEM intake valve designed for various Shibaura ST series tractors, including models ST318, ST321, ST324, ST327, ST330, ST333, ST338, ST340, ST343, ST346, ST348, ST350, ST445, ST450, ST460, ST470, ST480, ST490, and ST500. This critical engine component ensures proper air-fuel mixture intake, contributing to efficient combustion and engine longevity. With an overall length of 95 mm, a head diameter of 31.5 mm, and a stem diameter of 6.5 mm, this intake valve is engineered to precise specifications for a perfect fit and reliable operation in compatible Shibaura engines.