 Complete the following phrase:  The top class of the series continued to be LMP2. The LMGTE and GTC categories were combined, along with Super GT GT300 class vehicles, into a single performance balanced GT category. Silver and bronze level drivers were required in the amateur division. A new class, replacing the LMPC category which was not utilized in 2013, allowed a variety of Group CN cars to compete with standardized Honda engines. These cars are eligible for competition through 2017. At the end of the season, the first place team in LMP2 and the top two teams in GT received automatic invitations to the 