Our Hayabusa Swingarm Extensions are the highest quality billet aluminum Bolt On Hayabusa Swingarm Extensionsavailable at any price. Large 3/8" stainless steel fasteners are included - eliminating rusting and bending. These Hayabusa Swingarm Extensions stretch your motorcycle swingarm from 4 1/2 to 9 inches and requires a longer chain and brake line (both sold separately). "Proudly Made" in our Hendersonville, Tennessee - U.S.A. facility.