An interior trim part for a vehicle, the interior trim part having a structural part , the structural part comprising: - a chute channel portion having a substantially tubular shape extending along a chute demolding direction (Z) between a first end and a second end , the chute channel portion comprising a first wall , a second wall and two side walls extending between the first wall and the second wall , the chute channel portion has a chute channel internal face , the chute channel internal face delimits an expansion passage intended to guide an expansion of an airbag, - a base portion having a base portion internal face and a base portion external face , the base portion comprises a first base portion , a base protrusion and a second base portion , the base portion internal face of the first base portion is connected to the first end of the chute channel portion , the base protrusion extends between the first base portion and the second base portion , the external surface of the base protrusion protrudes with respect to the external surface of the second base portion and the base portion internal face of the base protrusion defines a recess , and - a reinforcing portion integral with the chute channel portion and the base portion , the reinforcing portion is connected to the base portion internal face , the reinforcing portion defines a plurality of cavities , the interior trim part is characterized in that : - the base portion is integral with the chute channel portion , and - the cavities include first wall cavities extending through the first wall , each of the first wall cavities extends in a protrusion demolding direction (D) between a first wall cavity bottom and a first wall cavity free end , the first wall cavity bottom being at the base portion internal surface , the first wall cavity free end being at the chute channel internal face , the protrusion demolding direction (D) defining a deviation angle (α) with respect to the chute demolding direction (Z), the deviation angle (α) being non null. - a chute channel portion having a substantially tubular shape extending along a chute demolding direction (Z) between a first end and a second end , the chute channel portion comprising a first wall , a second wall and two side walls extending between the first wall and the second wall , the chute channel portion has a chute channel internal face , the chute channel internal face delimits an expansion passage intended to guide an expansion of an airbag, - a base portion having a base portion internal face and a base portion external face , the base portion comprises a first base portion , a base protrusion and a second base portion , the base portion internal face of the first base portion is connected to the first end of the chute channel portion , the base protrusion extends between the first base portion and the second base portion , the external surface of the base protrusion protrudes with respect to the external surface of the second base portion and the base portion internal face of the base protrusion defines a recess , and - a reinforcing portion integral with the chute channel portion and the base portion , the reinforcing portion is connected to the base portion internal face , the reinforcing portion defines a plurality of cavities , - the base portion is integral with the chute channel portion , and - the cavities include first wall cavities extending through the first wall , each of the first wall cavities extends in a protrusion demolding direction (D) between a first wall cavity bottom and a first wall cavity free end , the first wall cavity bottom being at the base portion internal surface , the first wall cavity free end being at the chute channel internal face , the protrusion demolding direction (D) defining a deviation angle (α) with respect to the chute demolding direction (Z), the deviation angle (α) being non null. <EOS>