I think it was a 997 turbo cabriolet.

It was in a line of very dirty 997s and a couple other Porsches with Georgia plates here in Scottsdale, AZ. The last car in the pack was a cabriolet. The notible points for what looked like a 997 turbo cab were wide oval exhaust tips in rear bumper, horizonally split large holes in front bumper and horizonally split side ducts.

Years back when the 996 turbo came out there was a line of those too.

Do they test the cars here in AZ?

It seemed to be one of these, but cabriolet
http://www.hiro-graphics.com/car/ima...yshot_back.jpg

 

Been out for months, but only in testing by PAG/PCNA.