The infraction is a P2 penalty and violates the following sections in the 2015 NASCAR rule book:
12.1: Actions detrimental to stock car racing
188.8.131.52.2: Top Splitter Shelf Heights. Vehicle did not meet the minimum post-race splitter height.
As a result of this violation, crew chief Joe Shear Jr. has been fined $6,000 and placed on NASCAR probation through Dec. 31. Additionally, owner Dale Earnhardt Jr. has been docked 10 NASCAR Camping World Truck Series championship owner points.