Hey if sparks don't fly you're riding too high! But I've noticed not many car will do this for some reason. I know if I hit a curb doing 120 I would throw some sparks.
If you like cars that throw sparks, you should get a Life...
This thing throws more sparks than any car I have seen in GT4. Braking, turning, bumps, it's all good. Suspension is all the way down -1. It's not good for anything else, but damn it makes good sparks. Like a bottle rocket... without the accelleration...
Pictures don't really to it justice, but here are a couple anyway.