Crew chief Chad Knaus (L) looks at the #48 Lowes Chevrolet, driven by Jimmie Johnson, as crew members work on it in the garage area during testing at Talladega Superspeedway. (Photo by Rusty Jarrett/Getty Images for NASCAR) hide

Crew chief Chad Knaus (L) looks at the #48 Lowes Chevrolet, driven by Jimmie Johnson, as crew members work on it in the garage a... more