The 2008 Pontiac G8 marks the return of a large rear-wheel-drive car to General Motors' performance-oriented division. The G8 shares its basic design with large cars from Holden, GM's Australian subsidiary. The G8 is available as a base or sporty GT model. The base offers a 256-hp 3.6-liter V6 while the GT has a 361-hp 6.0-liter V8. A 5-speed automatic transmission is standard on the base, and a 6-speed automatic is standard on the GT. Exterior appearance is similar for both models, with the most obvious differences being chrome-trimmed door handles, clear taillamp lenses, and four exhaust tips on the GT. Available safety features include ABS, traction control, antiskid system, curtain side airbags, and front side airbags. GM's OnStar assistance is standard.