Earlier today the NHRA Technical Department released the 2015 NHRA Harley-Davidson Drag Racing Series Rulebook Supplement. These rule changes will come into effect beginning January 1, 2015. The 2015 NHRA Harley-Davidson Drag Racing Series Rulebook Supplement can be accessed by navigating to the TECH, Rules, 2015 NHRA Harley-Davidson Drag Racing Series Rulebook Supplement.  Please continue to visit NHRAracer.com periodically to get updates on the most recent Rule Amendments.