ERC 2974 SH - Adaptor, Zenith Carburettor to Inlet Manifold, Second-hand Land-Rover Series 2a and 3 £49.00 Quantity: at £49.00 each Add To Basket 1 in stock. Adaptor, Zenith Carburettor to Inlet Manifold, Second-hand Good used condition adaptor that fits between the Zenith carburettor and insulating spacer on 2¼ engines. Required if converting from Solex to Zenith or Weber carburettor. Original to Series 3 2¼ Petrol engines serial numbers prefixed 901 and 904, Suffix 'E' onwards and from 36116817A onwards. This adaptor has one auxiliary oulet to connect to the Top Rocker Breather system.