The 2008 Pontiac G8 is a performance-oriented large sedan available in base or GT trim. Base models come with 18-inch alloy wheels, a rear spoiler, air-conditioning, four-way power front sport seats, a tilt/telescoping steering wheel and a seven-speaker CD sound system with an auxiliary audio jack. G8 GTs add summer performance tires, a limited-slip rear differential, dual-zone automatic climate control, a leather-wrapped steering wheel and a premium 11-speaker Blaupunkt sound system with a six-CD/MP3 changer.Much of the GT's equipment can be had on the base model via the Comfort and Sound Package. For both trims Pontiac offers a Premium Package featuring leather upholstery and six-way power heated front seats. A sunroof is available as a stand-alone option. A Sport Package available for the GT adds 19-inch alloy wheels with summer tires and a sport steering wheel.