One of the easiest ways to improve overall performance is to reduce rotating weight. The Lightened HD Center Outdrives provide just such an advantage over the competition. These outdrives are “Heavy Duty” type direct replacement parts that fit the center differential of all 8IGHT and 8IGHT-T models and feature tight tolerance flats for the brake discs. These parts are precision machined from premium high-carbon steel and feature additional machining to remove heavy steel material without sacrificing strength. These ultra strong and light weight parts are heat treated to produce a hard wear resistant surface then get a black rust-resistant finish.