They stick out a little. Dennis has molds for wider fenders - not cheap though. As far as the fronts about all you can do is put motorcycle type fenders on it. I think he has molds for these also but they probably aren't wide enough.
If you are going to auto-x it I wouldn't do much to it as the rocks etc that the tires kick up put dings in the fiberglass. I have a number of them on the edges of my fenders. The nose could probably be reworked to get rid of the spoiler. a replacement again probably wouldn't be cheap but might not be anymore that having someone rework the old one.
You can split the fenders and add a section it. We just did this on a Locost and put widened motorcycle type fenders on the front.