Belly Pan - For Akrapovic Underseat ExhaustProduct Description The BELLY PAN 939 SUPERSPORT for under seat exhaust is a carbon fiber component created and designed by FULLSIX CARBON. Its a racing component that is fully race compliant and incorporate features from World Superbike and British Superbike to give you a competitive advantage such as maximum weight savings and improved aerodynamics. See below for which materials and surface treatments are available. Intended for under seat exhausts.