MIVV X-M1 Titanium Full System Exhaust for Aprilia Tuono 660 2020>MIVV X M1 Titanium Full System Exhaust for Aprilia Tuono 660 2020> Made to improve the aesthetics, sound and performance of the motorcycle, the Mivv slip on exhaust is born from the utmost attention to design, with the aim of satisfying those who want to distinguish themselves , also through the look of their own motorcycle. The X M1 line , is the result of the experience gained in the MotoGP and Moto2 world championships , it is the perfect synthesis