Originally Volvo carbs but rebuilt for a Triumph TR6, would work on other makes but would likely require a needle/spring change. SU HS6 1 3/4 inch. New throttle shafts, butterfly’s, jets, float bowl floats, valves, gaskets and screws. New needles to support a stock TR6 engine. Parts and needle pick from Joe Curto at British Superior. No play in shafts. Also included is a jet centering tool. Includes throttle linkage and parts to make the choke linkage. $600, bolts directly to stock manifold.