I recently installed a DR D full system on my 700,I love the way it sounds and looks,I'm having a minor issue with a exhaust leak where the slip-on and mid pipe mate,a forum member (glamis700) suggested to just loosen everything back up and make sure everything is aligned right and re tighten,which will probably correct this.As far as performance is concerned,I did the 3 mods at the same time and the difference is like night and day.