Dismountable intake manifold assembly 2018473 for housing a PHBG 21 carburetor consisting of: Flange, made from solid 11S aluminum alloy, with high mechanical characteristics and designed for coupling to Malossi crankcases. Inlet sleeve in rubber resistant to high temperatures, hydrocarbons and deformations, calibrated to guarantee support to the carburetor and dampen the vibrations produced, thus avoiding the risk of charge emulsions inside the carburetor bowl responsible for the variation of the ratio stoichiometric gasoline and the risk of engine breakdown. Coupling of the components with high precision and maximum sealing guaranteed by the specially made lip.