[Bjorn]

When I bought mine it had the rear `Maro Spoiler....after awhile I added the front, mainly because I liked the look....I was very surprised to find how much more stable the steering got at speeds abv 80 mph....they DO help.

and I added the 400 emblem to thevrerar of my rear spoiler.....and on 69s it doesnt cover up PONTIAC since its on the tail panel...
and in the link GUCCIENG provided abv ( I had thought to add that link to)..theres a paragraph:

The spoilers produced the desirable effects of increased traction along with a slight understeer condition. In controlling the lift of the nose so well, there was an increase in stability that a sensitive driver is able to feel even at moderate speeds.
In referring to the graph, It should be noted that the effectiveness of the spoiler equipment is proportional to vehicle speed. The faster you go the more effect the equipment has. The best part is it looks as good as it works!