The Motobilt 14 Bolt Diff Cover was designed with function in mind. The cover is made from high strength steel plate and full welded. The Motobilt GM 14 bolt full float heavy duty steel diff cover has many features that separate it from others. The GM 14 bolt full float HD steel diff cover features a 3/8 inch thick steel ring that will keep the cover from pulling away from the housing when dragging over rocks. The GM 14 bolt full float HD steel diff cover also features the proven 1/4 inch thick steel plate design with an integrated 3/4 inch NPT fill plug. The fill plug on the GM 14 bolt full float HD steel diff cover allows for easy access, especially when a truss system is commonly used.