NASCAR Heat 4 , the official video game of  NASCAR , looks, sounds, and plays better than ever! New Features: Track Maps, Unlockable Paint Schemes, Dynamic User Interface, More Driving Control Options, Deeper Career Mode, Sonoma Raceway & Charlotte Roval Track Updates. New Graphics & Sound: Complete overhaul of all graphics and audio packagesDraft Like a Pro - Team up and draft with other drivers with the drafting featuresSmarter, Competitive AI - The AI now runs multiple racing lines and utilizes new controls to adjust its skill range, stability and spread.