The McCormick 3678454M1 is a genuine OEM cylinder liner sleeve designed for a wide range of McCormick agricultural tractors. This critical engine component ensures proper cylinder sealing and heat transfer, contributing to the longevity and efficiency of the engine. Manufactured to precise specifications, it features an overall height of 177 mm, an outer diameter of 108 mm, and an inner diameter of 100 mm, with a collar outer diameter of 112 mm and a collar height of 7 mm. Weighing approximately 1.83 kg, this sleeve is an essential replacement part for maintaining engine integrity in compatible McCormick models.