Exhaust DOPPLER reducing ring of Ø28 with 25mm minarelli am6

The minarelli am6 euro 1, AM3, AM4 and AM5 are original equipped with Ø28mm exhaust. However, the machine equipped with latest minarelli am6 euro 2 are original equipped with a 25mm diameter exhaust, so you need to necessarily install this ring that reduces the exhaust of your cylinder 28 to 25mm. DOPPLER mark. Delivered as presented in the unit.