Air filtration assembly for a vehicle, comprising: i) a box comprising a wall which extends along a first axis (V-V) and a second axis (Y-Y) and comprises at least one outflow mouth through which the air flows, wherein the box also comprises a longitudinal axis (X-X) incident to the first axis (V-V) and to the second axis (Y-Y); ii) a filter cartridge comprising: - at least two tubular filter media which are traversable preferably radially during filtration; - a plate group to which the at least two tubular filter media are operatively connected; wherein the filter cartridge is insertable into the box in an insertion direction substantially parallel to the first axis (V-V) or to the second axis (Y-Y); wherein the air filtration assembly is characterized by the fact that the plate group extends with respect to an imaginary extension plane and, on the opposing sides of said imaginary extension plane, comprises a first face comprising at least one sealing profile and a second face comprising at least two contact profiles, wherein the plate group comprises at least one outflow opening suitable for placing the tubular filter media in fluid communication with the at least one outflow mouth; and in that the box comprises a housing region comprised between the wall and at least two contact elements which are longitudinally spaced apart from the wall and axially spaced apart from one another, wherein the plate group is housed in said housing region so as to have the at least one sealing profile sealingly engaged with the wall and the contact profiles engaged on respective contact elements; wherein the at least one sealing profile or the contact profiles are shaped or mutually positioned with respect to the imaginary extension plane so as to have variable vertical distances (dz1, dz1', dz2, dz2') therefrom, measured in a direction orthogonal to the insertion direction, in said insertion direction; and wherein the at least one sealing profile or the contact profiles are shaped or mutually positioned with respect to the imaginary extension plane so as to have variable longitudinal distances (dx1, dx1', dx2, dx2', dx2", dx2′′′') therefrom, measured in a direction parallel to the longitudinal axis (X-X), along the first axis (V-V) or the second axis (Y-Y). i) a box comprising a wall which extends along a first axis (V-V) and a second axis (Y-Y) and comprises at least one outflow mouth through which the air flows, wherein the box also comprises a longitudinal axis (X-X) incident to the first axis (V-V) and to the second axis (Y-Y); ii) a filter cartridge comprising: - at least two tubular filter media which are traversable preferably radially during filtration; - a plate group to which the at least two tubular filter media are operatively connected; - at least two tubular filter media which are traversable preferably radially during filtration; - a plate group to which the at least two tubular filter media are operatively connected; wherein the filter cartridge is insertable into the box in an insertion direction substantially parallel to the first axis (V-V) or to the second axis (Y-Y); wherein the air filtration assembly is characterized by the fact that the plate group extends with respect to an imaginary extension plane and, on the opposing sides of said imaginary extension plane, comprises a first face comprising at least one sealing profile and a second face comprising at least two contact profiles, wherein the plate group comprises at least one outflow opening suitable for placing the tubular filter media in fluid communication with the at least one outflow mouth; and in that the box comprises a housing region comprised between the wall and at least two contact elements which are longitudinally spaced apart from the wall and axially spaced apart from one another, wherein the plate group is housed in said housing region so as to have the at least one sealing profile sealingly engaged with the wall and the contact profiles engaged on respective contact elements; wherein the at least one sealing profile or the contact profiles are shaped or mutually positioned with respect to the imaginary extension plane so as to have variable vertical distances (dz1, dz1', dz2, dz2') therefrom, measured in a direction orthogonal to the insertion direction, in said insertion direction; and wherein the at least one sealing profile or the contact profiles are shaped or mutually positioned with respect to the imaginary extension plane so as to have variable longitudinal distances (dx1, dx1', dx2, dx2', dx2", dx2′′′') therefrom, measured in a direction parallel to the longitudinal axis (X-X), along the first axis (V-V) or the second axis (Y-Y).