Fits on 97 Mountaineer Rear Axle - Significantly reduces side-to-side sway when driving over bumps such as railroad tracks that are not perfectly perpendicular to the road. The car already had 4 Ranchi 5000 shock absorbers and auxiliary springs added to the leaf springs. The new part had much more resistance than the worn one. (200,000 miles) Item arrived in a white box with no brand identification.