Here we have a genuine SU service kit to suit a pair of HS4 1 1/2 inch carburettors as fitted to the MG Midget  1500.  This kit a pair of jets fitted with conversion brackets and would allow a car that still has original waxstat jets to be converted to red jets. This comprehensive kit contains jets, needle valves, gaskets and an 8 page fitting and tuning guide. Normally we would supply a pair of ABT needles, these would originally have been fitted to AUD 665 and FZX 1258 carbs covering years 1974 -78. If you have the later FZX 1122 and FZX 1327 please add a note and we will supply ADN needles. Please note the carburettors are not included but show a typical pair of carbs with red jets.Also included are a pair of red damper springs