The twin 1 1/4” SU carb set-up was the choice of John Cooper as he searched for increased performance in the Mini. This is a complete pair of right & left rebuilt carbs. Comes with all new seals, gaskets, needle and seat, jet tube assemblies, and new throttle bushings if needed. Carbs are fully disassembled, ultrasonically cleaned, and polished. Needles may have to be changed to match your application. Also fits Sprite and MG Midget . The air filter to carb elbow will not be inncluded unless you specify in the comment field you need one. These carbs now come with the o-ring spindle upgrades as in our WZX1310A kits.