f4i exhaust choices..
#11
this is mine. but you love or hate it and i love it but you will need a power commander. the fan blades in side that make it spin gives back pressure and when you give it gas, the exhaust gas will spin the cannon. the faster the cannon spins it acts like an open exhaust but with little back pressure. the sound is like no other loud and deep!!! but my bike fits that style of exhaust
#13
#14