This is a chambered exhaust that you have purchased, not even nearly a free flow
it is a free flow.. i can see aar par from inlet to exit.. its built the same way as a cherry bomb type exhaust.. only its body is of a chambered one.. i like the sound though.. its a low rumble... not a **** can at all
this thing is massive though.. very tight fit even in a civic... and when the car is loaded the strut bumps against the exhaust pipe