In the pic you have, that x pipe isn't resonated. Resonated x pipe looks almost like a muffler. Look up magnaflow resonated x pipes. Its what I used and a big improvement over the original x pipe plus resonators that I used. My other car has a vq35 and those motors rasp like crazy with aftermarket exhausts.
Originally Posted by robc1976
the new piping I am looking at has a X-pipe but I do not know if it is resonated.