A seat track system for use in a vehicle seat assembly having a seat base frame. The seat track system includes a lower track assembly having a first lower track and a second lower track and an upper track assembly having a first upper track slidably disposed within the first lower track and a second upper track slidably disposed within the second lower track. The first upper track has a portion extending upwards that forms a first side member of the seat base frame and the second upper track has a portion extending upwards that forms a second side member of the seat base frame. The first upper track and the first side member are formed integrally to form a one-piece unitary member and the second upper track and the second side member are formed integrally to form a one-piece unitary member.