To answer some questions from here and email since we posted:
Resin is a UV stable system, it should not yellow over time in the sun.
This part is not structural to the car. This will not turn your car into a slicktop chassis as far as increasing stiffness.
You can switch between T-Tops and the Targa because no modification to the car is required. It's designed to be a reversible change to the car, not an option on Sunday. You have to remove the headliner to install the Targa because it picks up the holes in the center bar.
On the street version we do not maintain any of the interior trim associated with the T-Tops. The point of this product is to remove weight from the top of the car and keep wind/rain noise out on the street version.
Rollcage installation should be easier because the T-Top trim is removed and you can probably install the top after the cage is in allowing more access to the main hoop during fabrication.
Sorry 2+2 owners, this is 2+0 only.
Race version has no window seals at the top of the window, so it's like driving with the windows cracked even when they are rolled all the way up... and why are you racing with your windows up anyway?
Pricing will be announced when the product is officially released on 300Degree.com.
Later
When was the last time you *really* did something with your Z to call yourself a Z enthusiast?