my lil analysis of pros about loud mufflers
flow free exhaust has clear engine exhaust out,, ok most agree.
I also experienced out that motorcyclists/ bicyclists especially ,,, ones who have no rear view mirrors on their transport ,,, tend to zigzag on road sometimes and may cut into yr path suddenly and cause accident,, because lack of road sense and sometimes stupidity.
By having a loud exhaust yes you will pay fines but same time also save somebody who may cut into yr path unaware that yre about to cross the same path.
(the cyclist can hear a car coming close even in loud noise of city traffic and will stay in his path till car passes him).
loud exhaust can be heard from distance especially the overcrowded city it helps.
ofcourse one has to take care that he donest bother folks in residential area by avoiding high reving engine.
since i have a loud exhaust i noticed cyclists havent banged into me,,,- touchwood.