The Circle Track 500 CFM 2G is a New Carburetor that has a .135 needle and seat assembly for adequate fuel supply and a small diameter float for maximum float bowl volume. The cluster is modified based on engine and vehicle specs to keep the fuel curve correct throughout the RPM range. Idle, transition and accelerator pump circuits are modified for circle track applications. Tapped to accept Holley jets for ease of tuning and finished with a 3/8″ fuel inlet. Venture size: 1 3/8″, Bore size: 1 11/16″. The JET 2G is IMCA racing approved.