For Derbi GPR 125cc 4T we offer here an Arrow exhaust silencer in the simplest version made of aluminium. The rear silencer changes the sound of the Derbi GPR fundamentally and can even tickle a little bit more torque out of the machine. A dB killer is of course built in. An EG-BE is also noted on the rear silencer, but this is only valid if the corresponding catalytic converter no. 11009KZ is used. In addition the intermediate pipe no. 51006MI must be installed.