High-torque exhaust left in a subtle design. Provides considerably more top speed. For those who want a new silencer and want more power, but do not want to ride with a small and particularly sporty sounding exhaust on their scooter. Very good torque curve and excellent performance on 50cc and 70cc sport cylinders. Fits on all Kymco and Sym models with vertical cylinders s. Exhaust system is E-certified but delivered unrestricted and is thus roughly the performance of the original system. An increase in output results, if the variator is tuned. As a rule, approx. 0.5 g - 1.0 g lighter vario weights should be used.