Here's a quote from the news: http://www.supercars.net/cars/3048.html

"The high speeds attained by the STARTECH Coupe V8 6.1 necessitate optimum aerodynamic efficiency. To reduce lift on the front axle and to give the coupe even more passing prestige STARTECH designers and aerodynamics engineers developed a front spoiler attached to the stock bumper.

The STARTECH side sills provide an optimal aerodynamic transition between the front and rear wheelhouses.

Lift on the rear axle is minimized by the STARTECH diffuser inserts for the stock rear bumper, a STARTECH roof spoiler and the STARTECH rear spoiler, which deploys together with the stock rear spoiler. "

But the whole argument here is: Why can't we have a better looking rear wing than stock?