The following are known Game Genie Codes for Days of Thunder on Nintendo Entertainment System (NES).

• Start With More Fuel
  NYKNIUNO
• Start With Less Fuel
  YIKNIUNO
• Faster Acceleration
  SXEYPUSU
• Tires Don’t Burst
  AAVOEXNY
• Better Left-Hand Cornering
  SNXOSKEY
• Maximum Acceleration
  IEUNLLLA
  SXEYPUSU