yeah I had a four piece aero kit on my old car and the shop I bought it from was first rate. Very high quality control standards so the fit was perfect. Front bumper only cost me $350 but somehow fiberglass for a Boxster (that's only 2" wider than my old car) becomes several times that.
With fiberglass the quality depends on the person making it that day. As with anything you get what you pay for.
