I have a res. delete, cat delete, 2.5" all the way out the back to dual flowmaster superflow 44's and when it revs it sounds like a ricer i aint gonna lie. but when i drive it it sounds pretty good, the exaust queits down and i just hear the blower at WOT. Has a nice deep sound up to around 2500 rpm as well. cost me $400 for everything.