Couple of pic

[porsche986spyder]

Here is another cool lookng rear bumper add-on. It goes over the rear bottom stock bumper and still leaves a nice opening for the exhaust.
http://www.visracing.com/catalog/product_info.php?products_id=4285

[porsche986spyder]

Or this turbo look. If you have lotts of money to burn. Company located in europe. You would have to get a new exhaust or at least re-locate the exhaust pipes to meet the new openings in this bumper.

http://www.stuttgart.co.uk/986t-look/986t_look3.html