A new product that every driver needs

[Phantom]

Originally Posted by camopaint0707

How does adding weight help mpg's?

Because the reduction in drag out weighs the addition of a few pounds.

[darcane]

Fiberglass is rather expensive for any sort of production parts, I doubt you could keep it under $250.

Look into Thermoforming or Rotomolding. Both of these can produce inexpensive plastic parts that might make your price point managable.

You will have significant tooling costs for all three methods, so, ideally, you can use the same design for many different cars.

[ConnClark]

Um..... how do you keep it from obstructing the view of the license plate?

[skyl4rk]

You mount the license plate on the tail.

I claim the aerodynamic cargo box as an open source project, with the rights to construct a cargo box freely available to all with no restriction.

[jsatter]

The ingenuity around here never ceases to amaze me. Great job.