Quote Originally Posted by allmotoronly
My brother's GT is completely stock, 2003 model. When he first got it (it had 15k miles on it), I drove it down I-75 south of forsyth. It is relatively flat through there. Getting to 125 or so was pretty quick. After that, it took a very long time to gain speed. At 140mph it was gaining 1mph every mile or so. Maybe if I would have stayed in it for another 10 minutes it may have gotten to 150, but I doubt it.
Who buys a Mustang and keeps it stock?

And they top out at 155 stock.