The Optibelt AP1003661 AGROPOWER V-belt, also known by its internal reference 6290001, is a high-quality replacement belt specifically designed for demanding agricultural applications. With an effective length of 3661 mm and a top width of 17 mm, this durable V-belt ensures reliable power transmission and extended service life in various Massey Ferguson tractors, including models 8650, 8660, 8670, 8680, 8690, 8727, 8730, 8732, 8735, 8737, and 8740. It directly replaces OEM part numbers 3617378M1 and 3617378M2.