I've got it with the perrin downpipe and I fricken love it. Sounds soooo burly and every person who drives my car is amazed by the sound. It's my personal favorite sounding exhaust. Cheapest place I know of is World One Performance, and I got it cheap because I'm local. It should run you about 500 without taxes or shipping. Gruppe-s has a great deal on the helix up/down combo, unbeatable actually. If you are looking to save a bit more money though, one can get the Bosal for about 350 and it is a quality piece as well, and not as loud.