As far as I can tell it's not even legal in Prepared.
I've got a letter into the SEB/PAC regarding this topic in Prepared. Here's what I wrote:
17.2.T states:
"T. All headlights, front parking lights, and
front signal lights may be removed. If removed, the openings shall be
covered with a wire mesh screen or panel of fiberglass, plexiglass,
metal or other nonflammable material. Ducts from headlights, front
parking lights, and front signal lights in the front of the car may be
used for ducting air to the engine, front brakes, and/or oil cooler(s).
Any opening used for ducting may not be relocated. These ducts may pass
through interior panels for this purpose. The cross section area of a
single duct shall not exceed the cross sectional area of the original
(single) headlight."
I'd like a clarification as this applies to cars with pop-up
headlights like first generation Mazda Miatas, first generation Mazda
RX-7s, Fiat X1-9s and other cars with hidden headlights.
Is the
headlight covering allowed to be made of an alternate material like
section 17.2.S allows for front fenders and hoods and 17.2.G allows for
bumper covers? If so, may it be incorporated into one of the adjacent
body components or must it remain separate? See photo integrated. jpg
for an example of a headlight door and hood made as one piece.
Although Prepared doesn't fall back on Stock or Street Prepared
rules that prohibit the headlight doors from being in a position not
achievable by the stock controls, may the headlight door be opened to
any angle, or must it remain in a fully open or fully closed position?
See photo Alternatehalfopen.jpg for an example of a car with headlight
doors in an unstock position by being half open and only one door is
open. Additionally, the doors are made of an alternate material and the
opening is not screened (it has been screened since the photo was
taken).
May the headlight door be removed to create the duct? May it be
kept closed and have the duct pass through it? Photos throughdoor.jpg,
throughdoor2.jpg and nacathroughdoor.jpg illustrate different openings
through the closed headlight door.
Must the duct created by an open headlight door be the size of the
headlight lens, or may it be as large as the opening of the headlight
door? In the case of a first generation Mazda Miata, is the duct
restricted to the area of a 7" circular headlight (38 square inches)?
Or may it be the size of the 8"x8" square door opening (64 square
inches)? See openheadlight.jpg for a picture of a stock, opened
headlight.
Aut tace aut loquere meliora silentio.