You will ask yourself why you waited so long to do the tuner, air filter and getting rid of the cat. It will be a completely new machine and you might be able to pass on the fans. I have, but if you find yourself in stop and go traffic then, you'll still want the fans. You just might be able to wait on doing it. Will really depend on just how much traffic and you or your passenger. I do still consider the fans in our 100º+ temps. But maybe 3 or 4 times a year I'm having trouble justifying them. But those other items you'll be amazed at the difference.