Features
Unparalleled Graphics - Dirt and oil accumulate on your windshield and sun glare creates a realistic driving challenge.
Race Against the Pros Right Out of the Box - Driving Tutorials and Aids like Steering Assistance and Ideal Race Line help bring rookies up to speed quickly.
Adaptive AI - Rookies and veterans alike experience fender-to-fender racing as the field adjusts to the driver's skill level automatically.
Feel the Groove - Detailed track surface mapping lets you feel every bump, dip, and rumble strip like never before.
Enhanced Physics Model - Actual data obtained from technical partnerships with the Goodyear Tire & Rubber Company and Jasper Motorsports provides the most accurate physics model available.
Unmatched Multiplayer Support - Play for bragging rights! Put your driving skills to the test as you race online against a full field of 42 NASCAR competitors.
All 23 Tracks - Race on all 23 NASCAR tracks, including the newly renovated New Hampshire International Speedway and Infineon Raceway.
   
http://nr2k3tracks.com is the best place to find links for mods and tracks.