Upgrade your SU carburettor with the Superflow needle and seat, featuring an updated brass/bronze needle design for improved fuel flow, durability and wear resistance. If fuel is overflowing from the float bowl, the needle and seat may not be sealing correctly. This can be caused by a misadjusted, sticking or leaking float, contamination in the needle valve, or normal wear. A faulty needle and seat can result in excessive fuel delivery, carburettor flooding and poor engine running. The CA90 Superflow type is an upgraded alternative designed to provide reliable fuel control and is suitable for HS2, HS4 and HS6 SU carburettors. Features: Superflow competition-style needle and seat Updated brass/bronze needle design Improved fuel flow and wear resistance Helps prevent fuel bowl overflow and flooding Suits SU HS2, HS4 & HS6 carburettors Ideal for performance engines and carburettor rebuilds Suitable for Classic Mini & Moke applications Alternative Options: AUD9585 – Fixed needle and seat AUD9096M – Spring-loaded needle and seat Float Level Adjustment: Adjustment spacer washers are available for setting the correct fuel level: AUC1081-F15 AUC1081-F30 When setting the float level, ensure the float is correctly adjusted and positioned in the recommended horizontal alignment for proper fuel control. A worthwhile upgrade when rebuilding an SU carburettor or addressing persistent fuel overflow and flooding issues.