NASCAR has updated its 2016 rules package for this coming weekend’s Sprint All-Star Race in an effort to further reduce downforce on Cup Series cars and bring corner speeds down by some three miles per hour on intermediate-sized mile-and- a-half ovals like Charlotte Motor Speedway, site of Saturday night’s race. Because it’s a non-points event, officials and teams will have an opportunity to observe the impact of the changes without compromising the integrity of the regular season – which already has twelve races completed. It is hoped that the adjustments announced Monday will provide closer, more competitive competition. NASCAR implemented a sweeping new set of low-downforce technical specifications for the 2016 season. One-third of the way through the current campaign, lead changes in the Sprint Cup Series are down four percent from last year.