So far, only to test. The car is still somewhat of a newborn to me so I'm still nervous driving it. I'd like to be able to listen to every little thing, get to know the car up and down, until I get more miles on her and get more comfortable with the car before I start blaring the stereo while cruising. I may not use it that much, but I'd rather have it and not need it than the other way around. Some probably think it's retarded to have a stereo in this type of build, but I built it to not only take out to the track, but to drive around town as well.