[AlexxZeman]

So I dont quite understand how exhaust without flap works.
Lets say you are lucky and you can close/open a flap, but what do you do if there is no one! If a flap is present it means when its open you get more sounds out of second pipe, but if you dont have a flap, does it mean second pipe is always open? Why there is no more prominent sounds than? Any experience with modding stock exhaust without flap? any ideas appreciated ))