Exhaust System - Nur Spec T (0 Product) The design and construction of the Nur Spec Touring exhaust is second to none. They are engineered from SUS304 grade polished stainless steel, with computer controlled precision ‘Tig’ welding. Nur Spec Touring exhaust systems feature a new inner silencer design to increase power and decrease noise. All Nur Spec Touring systems have passed the new Jasma regulations in Japan. Nur Touring systems are generally quieter than other systems, please check individual product info for the decibel rating.