SU H4 Historic Cooper 'S' Carburettors.
Swiftune has developed Float Bowl Extensions to eliminate fuel surge on the track. This in done by increasing the volume of fuel in the float bowl.
The bolts supplied are manufactured longer so the breather can still be used (breather is not shown in the picture).
This kit includes,
2x Float bowl extension rings 4x gaskets 2x Longer bolts
Image shows what the kit looks like assembled on the carburettor and components to complete the other side. Kit does not include fuel bowl.