The McCormick 3664176M91 is a genuine OEM electrical harness designed for various McCormick X6, X7, and X8 series tractors, including models such as X6.420, X6.430, X6.440, X6.460, X7.440, X7.450, X7.460, X7.650, X7.660, X7.670, X7.680, X7.690, X8.660, X8.670, and X8.680. This harness also fits Landini 6-120C, 6-130C, 6-140C, 6-150C, 7-140, 7-150, 7-160, 7-170, 7-180, 7-190, 7-210, 8-160, 8-170, and 8-180 series tractors, ensuring reliable electrical connections and system functionality.