I have the SERIE PRO PEP 3 on my PX200, AW - and it is a great pipe! More power, added torque and seemingly better fuel economy.
Great kit - in conjunction with the T5 fourth gear, it changes the PX200 into a very viable touring scooter
Excellent quality in construction, and very easy to fit. I have a Pinasco kit on my PX200, and this exhaust has further enhanced the mid range torque of the motor. Great piece of kit!