The Jammy pipe produces the most usable power in the low, mid, and high rpm. It is a smaller pipe but is perfect for a stock 49cc puch moped. It was designed to work with the existing intake and bing combo that came on puch mopeds. They use a hyro form technology that allows theym to get a perfect cone shape everytime. The flanges mate perfectly to create and airleak free tune everytime.
If you want the best possible combo of performance and style. The Jammy is your pipe.