NASCAR issues updates to Rule Book:

NASCAR issues updates to Rule Book: NASCAR issued a bulletin to teams with updates to the 2016 Sprint Cup Rule Book. Most are clarifications or updates as opposed to anything new. Among the items listed:
- Teams may change the radiator during Speedweeks at Daytona. The radiator may be changed after completion of the 150-mile qualifying races and must be completed before the final practice for the Daytona 500.
- Teams must use the same rear end differential assembly at all events except: All road course events, events at Martinsville Speedway, the Daytona 500, the Sprint Showdown and the Sprint All-Star Race.
- NASCAR listed how many sets of tires teams are permitted for races. Teams will be allowed one fewer set of tires than last year at seven venues, representing 11 races.
- NASCAR listed the tire codes for the first 12 Cup events this season. There will be new left- and right-side tire codes for races at Atlanta Motor Speedway, Las Vegas Motor Speedway, Phoenix International Raceway, Auto Club Speedway, Texas Motor Speedway, Richmond International Raceway, Kansas Speedway and Dover International Speedway.
- NASCAR listed the pit road speed limit for each track.
(NBC Sports)(2-9-2016)