1: "Upgrade your engine for more power."

2: "Install a performance exhaust system."

3: "Add a supercharger for extra boost."

4: "Upgrade suspension for better handling."

5: "Upgrade brakes for improved stopping power."

6: "Install a new transmission for faster shifts."

7: "Upgrade wheels and tires for better traction."

8: "Customize the exterior with a new paint job."

9: "Upgrade the interior for a comfortable ride."