I have been driving it today and it really isn't to bad on the drone, I haven't gotten it up to interstate speeds yet so that is still out for debate..... On the other hand, it is just a tad louder than I want it to be with my son riding in the racecar... I mean car. It will be fun to swap in it every once in a while for fun but I think I will probably keep the muffler on most of the time.