Exhaust Polini Evolution 70Cc 2010 Yamaha Bw's / Slider

Exhaust Polini Evolution 70 Yamaha BWs Exhaust Polini Evolution 2 70cc, very good racing exhaust from Polini for Minarelli vertical (Yamaha BW's / Slider, MBK Booster / Stunt). Without road approval, racing only! Classic expansion chamber exhaust made of welded sheet metal with beautifully crafted black silencer (special 2010 version). The exhaust was developed to fit the Polini 70cc aluminum cylinders of the Evolution series and is therefore considered a high-end exhaust, even if its performance level on Minarelli vertical engines places it more in the "Mid Race" range. Very good results are also achieved with other Minarelli vertical cylinders - e.g. Malossi MHR Racing 70, Stage6 Racing 70, Top Performances TPR 70cc aluminum etc.