Check out Number 3's post & pictures (page 2 at present) about the Metal Mule System. I have one - about 8.5 kgs lighter than standard. The heat by your right leg is noticable in traffic but no big deal.
OK system pig to fit and you need to replace one of the bolts holding the exhaust with a 13mm nut as you cant get an allen key back on as the bend of the pipe prevents this.