No. 4 Denny Hamlin

Denny Hamlin said there's no reason to worry about blowing another engine.
He and Joe Gibbs Racing teammate Kyle Busch blew engines during the All-Star race last weekend at Lowe's Motor Speedway. It was revealed later that both teams were trying an experimental engine package. The teams also said the experimental engine package was for the All-Star race only.
Hamlin's team has a brand new car for him for Sunday's Coca-Cola 600. It's most recent track time came during testing earlier in the month at Lowe's.
"This is a fast track that has been made faster over the past couple of years so there are no laps off -- no taking it easy," said Hamlin, driver of the No. 11 Toyota for Joe Gibbs Racing. "You can get into trouble in a hurry if you lose concentration here so in that sense 600 miles can be pretty grueling. In the same way that 600 miles takes a lot out of you physically. I noticed a huge change last year in this race when I came into it in much better shape. I feel even better this year so I don't expect it to be an issue. The biggest challenge of going 600 miles is on the crew to prepare a car that can last the duration while dealing with the change in conditions over the course of the race. You have to build a lot of adjustability into the car or you'll end up chasing the track and that can make a long day even that much longer. This FedEx team has always been really good at making sure we have room to work on the car and that's the way you need to approach this race maybe more so than any other race during the season."