They are pretty hefty. If you're looking for something you can take to the track, or if you're worried about off-the-line acceleration. I wouldn't recommend them. I, on the other hand, don't really plan on going out and racing the little Civics and other riced out cars around here, so I don't mind. I just like to cruise, and maybe give it a little on the expressway... Any more questions, let me know.