[fireresq157]

Underneath its essentially the same body as 2008 gt with some added weight, The Shelby gt 500 has around an extra 175 hp (given it weighs 400 lbs more) and it's only .5 seconds faster than the 2010 mustang?Those numbers for the stang are pre independent testing and pre production and unveiled for an auto show. The Challenger is rated at almost the same HP as the Camaro its 300 lbs more and its official number are 0-60 4.8. I can see the Camaro with the more modern suspension(compared to the mustang) putting down numbers closer to the Shelby GT 500 at 4.5. I know 4.6 was the official unofficial time but again that is pre independent testing and pre production. Anyhow .4 to .6 seconds would take alot of money to make up especialy when the numbers (times gets closer to 0). It definitely wont be new exhaust, cold air intake, pulleys, and a chip(30 or so hp at the rear wheels)alone . It will be closer but it will still need something more significant than the standard bolt-ons. The 15 hp increase is just to keep up with the weight increase.