Do it yourself - it really is a piece of piss
the side splitters (side air dams) need a small mod to make them fit or cut a slot in your bumper ( i modified the splitter ) then they just bolt and clip on ( I also used a small amount of double sided tape on each side )
once these are on bolt up the lip.......
search for threads on fitting these
I also have a few DIY instructions I could email to you.....