"Body provided deck lid spoilers allowed (not wings). No additional skirts or raised/extended wings or air control surfaces allowed. Body must be trimmed at body trim lines. Full rear bumper required. It is highly preferred that bodies are detailed in race type livery in period-correct paint schemes. Fluorescent colors, wild graphics, chromes and non-period correct paint schemes are frowned upon. All cars must have a number on the hood, both doors and trunk lid. Wheel covers of any type are NOT allowed.
All cars must include a driver figure consisting of at least a head and shoulders."
Its in plain English in the rules.....DECK LID SPOILER.......NOT WINGS. There is a difference between a Spoiler and a Wing. The Wing that comes with the mustang (GT350 for example) is NOT ALLOWED.