88-17 HARLEY FLSTC: Vance & Hines Super Radius Exhaust (Black) The next generation of radius style pipes has arrived in Super Radius, blending premium features, outstanding performance with Power Chamber Technology and the looks of a custom exhaust.Incorporated in the Super Radius, Vance & Hines has designed a new, r It is recommended that new exhaust gaskets and a Vance & Hines Fuelpak be installed when changing an exhaust system on a fuel-injected motorcycle.