The Unocal-Darlington Record Club was a club in the NASCAR Grand National and Winston Cup Series from 1959 to about 2001, based at Darlington Raceway. Membership was achieved based on setting qualifying records during time trials for the annual (Heinz/Mountain Dew/Pepsi) Southern 500 held on Labor Day weekend. During its heyday, it was considered one of the most prestigious and exclusive clubs in motorsports.