HP DUAL CARBURETOR KITSIncrease throttle response!Bolt-on horsepower, performance and reliability Flow bench tested with increased CFM over other modelsReplaces Weber IDF Dual Carburetor Kit perfectly. All parts are interchangeable-jets, venturis, emulsion tubes, etc. to insure carburetor will meet your needs. Profiled throttle shafts for increased flow past the butterflies. Dual linkage arms are already on carburetors-no swapping needed. Chrome velocity stacks. Kit includes 2 carburetors, 2 steel air cleaners, 2 ball burnished manifolds, complete linkage kits, hardware and gaskets.