GPR exhaust silencers ROY.4 are produced in various materials: aluminium, stainless steel, carbon, titanium and poppy with round or oval section and in various special versions (selectable in the options). GPR exhaust systems ensure power increase and a strong decrease of weight while maintaining in most cases the original carburation unaltered. All exhausts are supplied with everything needed for installation (link pipes, clamps, screws, brackets, etc ...).
GPR EU approved exhausts have rear cap removable (Db-killer) and are supplied with certificate of approval to be attached to the vehicle registration certificate. Official warranty 24 months.
GPR production for 4 strokes road bikes provides homologated exhaust systems and racing made by artisans in developing and assembly but with industrial equipment as regards the production capacity. For more information and technical details visit the manufacturer's website.