From the main menu go to the cheat code menu and enter "Race" as a first name and "ThePack" as a last name.
Submitted By: roadrooster379
All cars in chase mode
From the main menu go to the cheat code menu and enter "checkered" as a first name and "flag" as a last name.
Submitted By: roadrooster379
Unlocks walmart car
At the main menu go to the cheat code menu and enter "walmart" as a first name and "everyday" as a last name.
Submitted By: roadrooster379
EA Sports car
Enter EA SPORTS CAR as a code.
Normal Achievements
Complete the following achievements to unlock Xbox Live Gamerscore points.
Keep On Truckin' (10 Pts): Win a Craftsman Truck Series race.
National Hero (10 Pts): Win a NASCAR National Series race.
Badge Of Honor (10 Pts): Complete a Driver Badge.
Custom Car Creator (10 Pts): Complete a Custom Car for all racing series.
Heavy Medal (10 Pts): Win a Medal in "The Chase" Mode.
We're Talkin' About Practice (10 Pts): Record a Lap in Toyota "Test and Tune" Mode.
Trade Your Setup (10 Pts): Upload a Car Setup to EA Locker.
3 Wide (10 Pts): Earn Three Gold Medals in "The Chase" Mode.
Today Or Tomorrow? (10 Pts): Win a NASCAR Car of Tomorrow race.
Play It Again, Sam. (10 Pts): Save a Race Replay.
Chase For The Cup (25 Pts): Win a Championship in Season Mode using the Car of Tomorrow Series Full Schedule.
Earn Your Stripes (25 Pts): Earn a License in "The Chase" Mode.
Independent Contractor (25 Pts): Earn a Contract in "The Chase" Mode.
Online Horsepower (25 Pts): Win an Online Race.
Licensed To Drive (25 Pts): Complete all Licenses in "The Chase" Mode.
Craftsman Tools Reward (50 Pts): Save a Craftsman Tools Car Setup at any Track.
Toyota Reward (50 Pts): Complete all Toyota Challenges.
Sprint Reward (75 Pts): Win a NEXTEL Cup in Season Mode using the NEXTEL Cup Series '07 Schedule.
Full Throttle (100 Pts): Complete a 100% Length Race in Race Now or Season Mode.
Cross Country (100 Pts): Drive 5,000 Total Miles.
Pay The Bills (100 Pts): Complete all Contracts in "The Chase" Mode.
We Don't Need No Badges! (100 Pts): Earn all Driver Badges.
Chase Champion (100 Pts): Win a NEXTEL Cup in "The Chase" Mode.
All Or Nothing (100 Pts): Reach 100% Game Progress.
Easy pole position for Daytona and Talladega
When qualifying for a Daytona or Talladega race, turn off braking assists. This will allow your car to reach maximum speed, resulting in a pole position every time. This works in all race modes.