Which one do you have? The super sound?
Also i figured out they are for stock piping. I was just wondering if running a 2" piece on otherwise 2.5" piping would be bad. Cuz most used ones come with those pipes and they are cheaper than brand new ones without em <img src="#/f/iB_html/non-cgi/emoticons/confused.gif" border="0" valign="absmiddle" alt='???'> So i'm still gonna get that and cut off the flange and weld to a bigger pipe in a worst case.... if that's even possible