On Pontiacs website it lists the GXP having the following specs:

With it's clean, sleek lines, powerful form, and enhanced supercharger, the Pontiac Bonneville G/XP show car sets higher performance and appearance expectations for a full-sized sedan. The G/XP takes the Bonneville SSEi's supercharged V6 powertrain to a new level, with a KN™ air filter system, Corsa Performance "cat-back" exhaust, and an increase boost to the supercharger. The result is an impressive increase of 30 ponies from the SSEi® application, to 270 hp in the G/XP. "Whether a modified SSEi is setting world land-speed records or the luxury Bonneville is cruising city streets, the prestige of Bonneville is in the performance," says Bob Kraut, Bonneville brand manager. "The G/XP offers the large-car luxury segment a 'serious sport' alternative with the muscle of a performance sedan and the amenities of a touring car."

http://www.pontiac.com/pontiacjsp/pa...ept/bn_gxp.jsp

Plus it looks different than the GXP version shown in these pics:

http://www.fordvschevy.com/

This pages also lays out the following specs for the GXP:

4.4-Liter, 32-valve V-8 engine
Hydra-Matic 4T80-E automatic transmission with a floor-mounted shifter
GXP-specific instrument panel
Carbon fiber-look interior trim bezels and steering wheel
Seats are leather appointed with suede inserts
GXP-specific performance series exterior badging
Ten exterior colors with two premium tri coats available
Special GXP front fascia/rear fascia, fog lamps, rocker panel extensions, 3-piece rear deck spoiler
Lowered wheel-to-body ride height
Performance-tuned suspension components
Front/rear dampers and stabilizer bars
Larger diameter, high-performance front and rear disc brakes with heat-resistant ceramic coated calipers
Specially tuned exhaust system maximizes the performance and sound quality of the 4.4-Liter V8 engine
Five-spoke aluminum wheels and P235/50R 18-inch W-speed-rated tires
Brushed aluminum shifter handle

 

The V6 is a concept from last years Chicago Auto Show..

The one on Ford vs. Chevy.com is the real production verison.

 

Looks just like the GTO to me.

 

This is one of those unheard of instances in history where the production version of a concept car is far better than the original concept was!

 

Yeah..too bad it will approach $40K i am guessing.

 

I am liking the new streamline shape that pontiac is taking very nice.

John D.