The McCormick 3551994M1 Valve Guide is a genuine OEM component designed for precise fit and reliable performance in a wide range of McCormick, Massey Ferguson, and Landini agricultural tractors. This critical engine part ensures proper valve stem alignment, reducing wear and maintaining optimal engine efficiency. With an outer diameter of 15.9 mm, an inner diameter of 8.7 mm, and a length of 95 mm, this valve guide is engineered to meet original specifications for long-lasting durability and consistent engine operation.