what is this?

[ddmcse]

you are not going to get much exhaust for 350 dollars .
make a replacement part in welding class the same size as the cat only like 3 inches diam. aka a test-pipe
if you are really good @ welding you can replace/remove the precat in the down pipe .
the modded pre-cat won't affect emissions testing too much so you can leave in all the time and you can pop in the "test_pipe" whenever you need to . that will give you a few ponies for close to free.
hello fco