Atlanta Motor Speedway's three-day Pep Boys Auto 500 NASCAR NEXTEL Cup race weekend was extended two days, allowing teams to participate in a Car of Tomorrow test at NASCAR's fastest track.

More than 50 cars were on hand to fine-tune the NASCAR race car that will make its Atlanta Motor Speedway debut during the March, 2008 Kobalt Tools 500.

"The Car of Tomorrow does drive differently, there's no question," said veteran driver Jeff Burton. "But probably not as differently as one would assume. The struggles that we have with the current car are similar to the struggles we have with the new car. The new car makes overall less grip, so that tends to magnify the problem more. But if I read the comments from what I said on Sunday during the race, they're very similar to what I'm seeing today."

Kyle Busch posted the fastest lap during the two-day test with a circuit around AMS' 1.54-mile quad oval in 29.632 seconds, (187.095 mph).

The drivers' and teams' hard work during the Monday and Tuesday test will come to fruition at AMS during the March 7-9 Kobalt Tools 500 Sprint Cup Series race.

Below is a link to each session during the test.

Day 1, Session 1     Day 1, Session 2

Day 2, Session 1     Day 2, Session 2