The Holley 500 two-barrel carburetors were made just for circle track racing. This particular model is box stock with the manual choke still intact. They have many performance features, such as a manual choke, center hung float bowl, universal throttle lever, all-metal parts, replaceable jets, a power valve, high flow venturi, and a standard 5 1/8" air cleaner flange. Holley 500 carbs come with a 73 main jet and a 3.5 power valve.
Contact our Tech Support Line for further information at 928-575-2174.