The John Deere AE44088 is an authentic OEM piston designed for optimal performance in various John Deere agricultural and construction machinery equipped with the 6466 engine. This high-quality piston is a crucial component for engine rebuilds and maintenance, ensuring durability and adherence to original factory specifications. It is compatible with a wide range of models including 4040, 4240, 4440, 4640, 4840 Tractors, 6620, 7720, 8820 Combines, 7440, 7760, 9940, 9950 Cotton Pickers, 740, 744, 744H, 744J, 744K Loaders, 770A, 770B, 770BH, 772A, 772B, 772BH Graders, and 862 Scrapers.