Viper

Viper is a steel looping roller coaster located at Six Flags Darien Lake Amusement Park near Buffalo, New York. This was the first large ride at the park and the first roller coaster of its type anywhere in the world to have five inversions.
The ride was built by the newly merged Arrow Huss. It opened in 1982. The coaster opened with the potential of running three trains at once, but only one or two trains are necessary for maintaining a steady operation of the coaster. The coaster's trains include seven cars; riders are two across with two rows in each car. The track was originally all black, but it was repainted to a green track with black supports when Six Flags took over Darien Lake. In 2010, Darien Lake repainted the Viper all black again.

The trains on Viper were once color coded blue, red and yellow. In 2013, the trains were given green vinyl wraps. One train had an orange stripe and another had a blue stripe. The third train was disassembled and used for spare parts for the two other trains. Currently, Viper only runs with one train with the two trains switching out every year.

Wikipedia