What IS The Steering Rack
 

I need to cut my steering rack but I don't know exactly what it is. I need sharper turning to the right the steering is horrible. Also, What should I cut this with, this steering rack

The steering rack is in the front of the chassis between the front wheels. It is white on Zip Zap SEs and has teeth in it so the steering servo can move it. I have never modified the steering on a car this small so I can't help you with that.