Meridian Speedway

Chaparral Speedway (turn your sound down...they've got an audio thing when you get there)

Magic Valley Speedway

Western Idaho Racing Association (WIRA)

Motorsport.com

NASCAR

Speed Channel

Racer Parts Wholesale (not a sponsor, but good prices & selection)

Longacre Racing Products (another good vendor for parts)

Racersguide.com (no affiliation here, they have some cool stuff up)