top ten racing parts

What are the top ten racing parts?? What is the best parts to install, you know the ones you can't live without having on your go fast car?


#10. Cold Air intake

#9. Exhaust headers

#8. Exhaust

#7. Brake Rotors

#6. Upgraded Fuel system

#5. Line lock kit

#4. Ignition system upgrade

#3. Water Methanol kit

#2. Forced induction

And My number one choice in the top ten racing parts would deffinantely have to be....
#1 Nitrous oxide