Pair of new 1.5" SUs, with rod linkage, but no heatshield, fuelpipe or manifold; just what you want if you've got a pair of old tired carbs. You will need a
12H889 T piece or
12G292 link pipe to run the fuel system if your original carbs had the twin inlet/outlet on one float bowl lid. Twin
HS4 SU carbs have been the most popular performance tune for the A series fuel system since the early Monte Carlo rally days. There is no question about the performance potential of this set-up but old worn out carbs can have very disappointing results. Twin carbs on a good manifold with quality air cleaners easily fit under the bonnet of the Mini or Spridget and could perform as well as the highly touted side draft Weber!
see also
C-AUD641 for
HS6 1.750" carbs