Roaring Toyz Billet Bolt On Swingarm Extensions. Use these trick machined aircraft quality billet aluminum swingarm extentions to extend your sportbike 2-8" over the stock wheelbase. These extentions are the highest quality parts on the market. Roaring Toyz has engineered these through many years of racing experience. Our extentions fit perfect and are designed to work with the stock brake systems on all the late model sportbikes. These are not the junk knock off parts you here about breaking, not fitting or working properly. These are the real thing STRONG,Fit Well,Tested and used on bikes with 300-500 H.P. Our extentions come with all needed hardware for an easy bolt on installation!