A pultrusion process for making a composite product comprising a tubular elongated body extending along a prevalent development direction and bounded by an outer surface comprising: - a base surface and - one or more projections emerging from the base surface and arranged transversely to the prevalent development direction of the elongated body, said projections or successive sections of the same projection being spaced apart from each other in a direction parallel to the prevalent development direction, said process comprising: - impregnating a reinforcing fiber with synthetic resin in a liquid state, optionally with thermosetting resin, - moving the impregnated reinforcing fiber towards a forming head, wherein said forming head has at least one through opening suitable for shaping the product, - arranging across the forming head two or more operating sections of respective additional elements configured for forming respective projections, - continuously forming, within the opening of the forming head, consecutive portions of a continuous composite semifinished product of tubular shape, - transversely cutting a discrete segment of the continuous semifinished product for defining said composite product, wherein respective upstream sections of each additional element, defined upstream of the corresponding operating section, are positioned at respective areas radially outer the continuous semifinished product. - a base surface and - one or more projections emerging from the base surface and arranged transversely to the prevalent development direction of the elongated body, said projections or successive sections of the same projection being spaced apart from each other in a direction parallel to the prevalent development direction, said process comprising: - impregnating a reinforcing fiber with synthetic resin in a liquid state, optionally with thermosetting resin, - moving the impregnated reinforcing fiber towards a forming head, wherein said forming head has at least one through opening suitable for shaping the product, - arranging across the forming head two or more operating sections of respective additional elements configured for forming respective projections, - continuously forming, within the opening of the forming head, consecutive portions of a continuous composite semifinished product of tubular shape, - transversely cutting a discrete segment of the continuous semifinished product for defining said composite product, - impregnating a reinforcing fiber with synthetic resin in a liquid state, optionally with thermosetting resin, - moving the impregnated reinforcing fiber towards a forming head, wherein said forming head has at least one through opening suitable for shaping the product, - arranging across the forming head two or more operating sections of respective additional elements configured for forming respective projections, - continuously forming, within the opening of the forming head, consecutive portions of a continuous composite semifinished product of tubular shape, - transversely cutting a discrete segment of the continuous semifinished product for defining said composite product, wherein respective upstream sections of each additional element, defined upstream of the corresponding operating section, are positioned at respective areas radially outer the continuous semifinished product.