What about a ramming device of some sort? Could be fun. A boxing glove attached to a spring xD Nah but seriously maybe an energy spike of some sort, similar manner to the shield. Or the shield could be used in ramming, if the shield gets a frontal version. Think about it; you have frontal shield equipped, get a speed boost, see an opponent racing in front of you but you just can't catch him, then you deploy the boost and BANG ram into him (the shield/ramming device makes it so that you don't fly all over the place because the shield absorbs the motion energy, only the car that you rammed does). Also it does damage of course.