I run the Kooks Exotics system (catted) on my car, Love it! got rip of the idle and low end raspy sounds and sounds much deeper/meaner than stock. The Race version (no Cats) Is Really really loud with a bunch of pops and bangs at the top end, To much for me but might be what you're looking for, The vid below is the Catted setup
https://www.youtube.com/watch?v=C4L0_U9uBZk