September 21 2013 New Hampshire Sylvania 300 Happy Hour Practice Speeds and Averages Ryan Rantz NASCAR News, Practice Speeds Average Speeds, Loudon 10 Lap Averages, NASCAR 10 Lap Averages, New Hampshire, New Hampshire 10 lap averages, New Hampshire Average Speeds, New Hampshire Sylvania 300 Practice Speeds New Hampshire Sylvania 300 Happy Hour Practice Speeds and 10 Lap Averages More