Give you car a little extra deep throaty sound. Magnaflow changed the dimensions of this part, and it will no longer work as a replacement for an older Magnaflow muffler.In the process of getting this figured out, I called Magnaflow; the first person I spoke with was extremely rude and obviously had a problem with women. They sound better than I ever imagined and with no notable performance loss going from straight pipes. Results are amazing! Nice screaming sound on higher revs. I'm completely sold on Magnaflow.