The Barnes 4wd Ford 8.8 differential cover is laser cut and formed in a state of the art CNC Press Brake. The cap is made from ¼” Steel, and the flange is 3/8” steel. WE GUARANTEE THEM FOR LIFE. All covers are fully welded and machined flat. These covers are made to withstand the harshest conditions. Like all our products they are made in the USA.