The big metal box is empty. The CATs are in the mufflers. It still would not hurt to replace that big square box with something like @Paul Bryant makes to smooth out the flow. To get rid of the CATs you will need TORS or some other aftermarket muffler.
The big metal box is empty. The CATs are in the mufflers. It still would not hurt to replace that big square box with something like @Paul Bryant makes to smooth out the flow. To get rid of the CATs you will need TORS or some other aftermarket muffler.