well mate in simple words i can only say that
there is a whole setup of exhaut gas that is to be outwarded from the end of ur car to realese its pressure to make it succes with out loosing the combustion pressure compmay fits with stock one to reduce noise ratio and to make environment more clear
but we need performance that company does'nt wants couz they give us milage and we always want performance lolz
anyways to make it proper remove ur 2 or 3 depends on ur car exhasust and only set an after market exhaust or desi one with no chadar from inside
that will prove to be a free flow
and yeah no chadar means no hindrence of going pressure to be stoped
try it out and don't forget to tune ur car again after putting it
