Replacement cap made of billet steel For 3.265" bore case Includes heat treated grade 8 hardware Proudly made in the USA Sold EACH One of the most common causes of rear end component failure can be traced to the stock rear end caps. To cure this problem MW makes a replacement cap from billet steel with an increased cross section and heat treated grade 8 hardware (included). Requires precision measuring of the cap bore and milling of cap parting line to install. Normally, only the driver’s side cap has to be replaced.