Hello, I'm looking to buy and 06' GT and the seller says it has a "roush package" and is now 700HP? Does this sound right and what would the package have cost? pro's and con's?
Not likely 700hp. Don't think you can obtain that without going for a Whipple S/C. Most pulley and tunes can get you around 600hp AT THE REAR WHEELS, depending on the exhaust. I have one car that dyno'd at 600hp and one at 630hp (different exhaust, different time of year). To be honest, I can't feel the difference between them much. Unless the dealer is one of our 2 forum sponsors (Bernie or Shelby), I would be very skeptical of their claims - this being a perfect example.