125 was my highest so far. I backed off at that point. Almost double the speed limit on the Parkway lol.
You can always tell when a generation of GTI has dipped under the $15k threshold by the perpetuation of these top speed threads.
What I'd really like to know is what the theoretical top speed is. Meaning, how fast is it capable of going with the gearing it has. What speed will it be at in 6th gear and at fuel cutoff. I recently had stage 1 installed (ECU flash) and had it at 140mph before I came up on traffic. My car wasn't slowing down either.