? 51,5 mm,l 100 mm,for art. no. P1900039Product descriptionA fresh breeze for the Maxiscooter exhaust market is provided by POLINI with this series of exclusive exhausts. Their production quality and surface finishing combine the most modern of designs with excellent quality and all 100% Made in Italy! This exhaust is available with their black anodised silencer and its optical gimmicks make it immediately noticeable. The black end cap attached by bolts and the small black heat-shield located on the connection between the silencer and downpipe manifold give this pipe a mean race-look. The one-piece stainless steel downpipe manifold is provided with a connection for the lambda sensor. According to POLINI, this exhaust system provides a slight increase in power output and increased overall performance, especially improving acceleration and throttle response.The race technology department at POLINI has developed an even better exhaust especially for their 171cc, 3V cylinder kit (#P1400216