Sorry, that gear limitation is on base/limited. SRT has different gears. SRT is gear limited to 170mph (and it takes 318hp). To hit 200mph would require a 2.65 final drive, 6000rpm and 570hp. Or you can up your rev limiter to 6500, use 2.9 final drive and that would take 500hp (the higher final drive gives more torque multiplication and therefore less HP is required).