LEGO Racers race track parts from the set #4588 Off-Road Race Track and one other unidentified set (or possibly more). There are a total of 31 track pieces and 38 black connectors included. The track pieces are as follows (and will have unique photos):
2 Y-Splits (brown)
3 Stunt Ramps (2 white, 1 gray)
4 Sloped Ramps (2 tan, 2 gray)