Not all teams announce their weekly race chassis'. Here is a list of those teams that do reveal the chassis in the teams race preview:
#1- Jamie McMurray - Crew Chief Kevin “Bono” Manion and the No. 1 McDonald’s team will bring Chassis #1106 to Charlotte Motor Speedway this weekend. This chassis has raced this season at Bristol, Charlotte, Pocono, and Kentucky with a best finish of 7th (Bristol).
#2- Brad Keselowski - The No. 2 Miller Lite Dodge Charger team will race chassis PRS-830 during Saturday night’s Bank of America 500 at Charlotte Motor Speedway (CMS). Keselowski last raced this chassis to a ninth-place finish in the Brickyard 400 at Indianapolis Motor Speedway in July
#5- Kasey Kahne - For Saturday’s race, crew chief Kenny Francis has selected Hendrick Motorsports Chassis No. 5-729. Kahne drove this car to a third-place finish at Michigan International Speedway in August.
#9- Marcos Ambrose - The No. 9 RPM team has prepared chassis No. 735 for this weekend's NASCAR Sprint Cup Series race at Charlotte. This Stanley Ford was run previously this season at Las Vegas, Texas, Charlotte and Pocono.
#10-David Reutimann - Reutimann will pilot chassis No. 356, purchased from Richard Childress Racing in the off-season. Reutimann last drove this chassis at Richmond International Raceway. Reutimann drove the chassis at Las Vegas Motor Speedway, Auto Club Speedway, Texas Motor Speedway, Kansas Speedway, Dover International Speedway, Kentucky Speedway, New Hampshire Motor Speedway, Pocono Raceway and Michigan International Speedway this season. He had his best showing in the chassis at Michigan International Speedway where he drove from the 39th starting spot to a 21st-place finish. His best qualifying effort of 16th was at Kansas Speedway.
#14-Tony Stewart - Chassis No. 14-736: This car debuted in the Chase opener at Chicagoland Speedway in Joliet, Ill., where Tony Stewart qualified 29th and rallied to lead three laps before finishing sixth. Chassis No. 14-736 will make its second career start Saturday night at Charlotte.
#15- Clint Bowyer - Primary chassis No. 740 finished 10th at Chicago in its only race of the year. Backup chassis No. 716 raced earlier this season in Las Vegas, Kansas, Charlotte, Kentucky and Indianapolis. Chassis No. 716’s best finish was sixth at Las Vegas
#16- Greg Biffle - Greg and the No.16 3M team heads to Charlotte this weekend, they will be bringing chassis 817 to the 1.5 mile track. In the chassis second outing at Michigan, Biffle took home the win, and its last time out Biffle crossed the finish line 13th at Chicago
#17- Matt Kenseth - This weekend at Charlotte, Kenseth will pilot the No. 17 Best Buy Ford Fusion, primary chassis RK-821, it last ran at Chicago.
#22- Sam Hornish Jr. - Hornish and the Penske Racing No. 22 Team will be utilizing the "PRS-824" Shell-Pennzoil Dodge Charger this weekend at Charlotte. The 22 team raced it at Loudon in July where Hornish started 24th and finished 22nd. Before that race, it had been utilized once by teammate Brad Keselowski's Miller Lite Dodge Team. Keselowksi and his Paul Wolfe-led "Blue Deuce" crew raced the car at Richmond in the April 28 Capitol City 400. Keselowski drove from a 16th-place start to a ninth-place finish in that race. The "807" chassis will serve as the backup this weekend. It was in the 22 team transporter serving as the backup at Phoenix, both Bristol races, Martinsville and the second Richmond race. It has never seen any track time to date.
#24- Jeff Gordon - Gordon will drive chassis 24-732 at Charlotte, it finished 5th at Indianapolis and 2nd at Atlanta in 2012
#27- Paul Menard - This Week’s Pittsburgh Paints/Menards Chevrolet at Charlotte Motor Speedway for Paul Menard will be Chassis No. 371 from the Richard Childress Racing NASCAR Sprint Cup Series stable. This Chevrolet was last raced at Chicagoland Speedway in September, where Menard started 11th and finished 15th. This chassis was also utilized in as a No. 29 racer at Indianapolis Motor Speedway in July where RCR teammate Kevin Harvick drove it to a 13th-place finish, and was used in 2011 competition as the No. 33 entry at Texas Motor Speedway (November-finished ninth), Kansas Speedway (October-finished seventh) and Chicagoland Speedway (September-finished seventh).
#29- Kevin Harvick - Kevin Harvick will pilot Chassis No.404 from the Richard Childress Racing NASCAR Sprint Cup Series stable in the Charlotte 500. Built new for competition in 2012, this Chevrolet will make its first competitive laps this weekend at Charlotte Motor Speedway. Harvick's primary sponsor will be Jimmy John's this weekend at Charlotte.
#31- Jeff Burton - Jeff Burton will race chassis No. 359 from the Richard Childress Racing NASCAR Sprint Cup Series stable at Charlotte Motor Speedway. This No. 31 Chevrolet has been utilized twice during the 2012 NSCS season at Bristol Motor Speedway in March where Burton piloted the RCR machine to a top-10 finish (sixth-place) and at Indianapolis Motor Speedway where a broken brake rotor late in the race relegating the team to a 32nd-place finish.
#42- Juan Pablo Montoya - Crew Chief Chris “Shine” Heroy and the No. 42 Target team will bring Chassis #1107 to Charlotte Motor Speedway this weekend. This chassis raced previously at Indianapolis and Atlanta, finishing 21st on both occasions.
#43- Aric Almirola - The No. 43 team has prepared chassis No. 742 for Charlotte. This chassis has run previously this year at Dover, Chicago, Pocono and Darlington.
#55- Mark Martin - Martin will race chassis No.732 which last raced and finished 34th with Martin at Charlotte in May. Backup chassis is No.708 which has not raced in 2012.
#88- Dale Earnhardt Jr - This weekend at Charlotte, crew chief Steve Letarte and the No. 88 crew will unload Hendrick Motorsports Chassis No. 88-726. Earnhardt most recently raced this chassis to an eighth-place finish at the 1.5-mile Chicagoland Speedway in September. Due to a concussion suffered at Talladega, Dale Jr will not be in the car, Rgean Smith will assume driving duties.
#99- Carl Edwards - The 99 team will be bringing chassis RK-782 to CMS. This car was last raced at Atlanta where Edwards was running in the top 10 when he had engine issues.
- Reported in Team News/Press Releases