Rubber flange adaptor to install spigot-mount carburetors directly to a manifold or head designed for Amal carburetors. No need for conversion adaptor plates or other modifications. The small version has a bolt spacing of 2", and accepts 2600-series Amal MkIIs and VM26 Mikunis. The large version has a bolt spacing of 65mm, and accepts 2000-series Amal MkIIs and VM36/38 Mikunis.