I would not put a HP number on it because alot depends on how the engine and car are built.
Just need to be more attentive to your driving with all that power. The extra power can make you think your driving a smaller/lighter car, and you can exceed the speed limit very easy if you don't check the speedometer. The reality is that on the street there are very few times and/or places where you can even use more than 1/2 throttle. Some places you may try using full throttle, like merging onto a highway or passing a car, you still need to be careful with loss of traction, and running up on slower traffic at triple digit speeds.