High-torque exhaust in a subtle design. Delivers noticeably more top speed. For those who need 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 old PGO models with vertical cylinders. This exhaust system is supplied without E-certification and matches older models of PGO with original systems. An increase in output is only achieved if the variator is tuned. As a rule, about 0.5 g - 1.0 g lighter vario weights should be used.