|Matt Kenseth fast in Thursday test session, don't know chassis (Getty)|
Kasey Kahne: Francis will unload Hendrick Motorsports Chassis No. 5-779 for Sunday's event at Las Vegas. Kahne will drive this car for the first time during Thursday's test session at Las Vegas.
Marcos Ambrose: The #9 team has prepared chassis No. 840 for Vegas. This is a new chassis that the team built in the off-season.
Danica Patrick: Chassis No. 10-751: Chassis No. 10-751 was first used by Patrick in October 2012 at Kansas Speedway in Kansas City when Patrick started 40th and finished 32nd after an accident ended her day after just 154 of 267 laps. Patrick then tested the car in January at Charlotte (N.C.) Motor Speedway.
Tony Stewart: Chassis No. 14-707: This car made its first start in May 2012 in the non-points NASCAR Sprint All-Star Race at Charlotte (N.C.) Motor Speedway. It was an unassuming debut, as Chassis No. 14-707 started ninth and finished a quiet 17th. The car sat idle until returning to action for the Labor Day weekend event at Atlanta Motor Speedway. It won the pole and led eight laps early in the 327-lap race, but as day turned to night, the handling of the car deteriorated, leaving Tony Stewart one lap down in 22nd when the race ended. It has since been totally rebuilt with 2013 Chevrolet SS sheetmetal, and it will be used for the open test Thursday at Las Vegas Motor Speedway before serving as the No. 14 team's backup racecar for the remainder of the weekend.
Clint Bowyer: Primary chassis No. 738 finished second in the 2012 season finale at Homestead-Miami, and finished sixth at Kansas in the fall. The backup chassis (No. 724) raced to top-five finishes at Bristol (fourth) in March and Dover (fifth) in June. It also finished seventh at Bristol in August and tested at Charlotte in January 2013.
Greg Biffle: Primary Chassis: RK-825 Last ran Kansas finished 27th; Backup Chassis: RK-809 Last ran Texas finished 10th
Ricky Stenhouse Jr.: Primary Chassis: RK-820 test car at Charlotte test. Backup Chassis: RK-815 chassis for the #99 in 2012
Joey Logano: Primary Chassis: PRS-840 New chassis; Backup Chassis: PRS-835 New chassis
Paul Menard will pilot chassis No. 403 at Las Vegas Motor Speedway this weekend. This No. 27 Chevrolet SS is a new addition to the Richard Childress Racing stable in 2013.
Kevin Harvick: will pilot chassis No. 396 from the Richard Childress Racing NASCAR Sprint Cup Series stable in the Kobalt Tools 400. Harvick last drove this RCR racecar to a 12th-place finish at Chicagoland Speedway in 2012.
Jeff Burton will race chassis No. 393 this weekend at Las Vegas Motor Speedway. This No. 31 Chevrolet was utilized five times during the 2012 NASCAR Sprint Cup Series season at Auto Club Speedway, Darlington Raceway, Michigan International Speedway, Atlanta Motor Speedway and Kansas Speedway.
Ryan Newman Chassis No. 39-760: Newman will pilot Chassis No. 39-760 at Las Vegas Motor Speedway. Built new for 2013, Chassis 39-760 made laps in January at Charlotte Motor Speedway while participating in the final test for NASCAR's sixth-generation Sprint Cup car. It will see its first laps of racing competition this weekend.
Aric Almirola:: The #43 team has prepared chassis No. 742 for Vegas. The team raced this is chassis in Homestead last year.
Jimmie Johnson: chassis No. 728 at Las Vegas. Chassis No. 720 serves as the backup.
Mark Martin: Primary/Backup Chassis: 715/720
Dale Earnhardt Jr.: This weekend, crew chief Steve Letarte and the No. 88 team will unload Hendrick Motorsports Chassis No. 88-726. Earnhardt most recently raced this car to a seventh place finish at Texas Motor Speedway last November.
Carl Edwards: Primary: RK-831 new chassis; RK 808 backup last ran in Atlanta
- compiled by Jayski.com