The Special Market (e17) is made up of components including this Steering Stem which is the most expensive.
Parts such as the Special Market (e17): Brace, Rear Fender Extension, Spacer(6.2x8.3x5.7), Frame, Screw (6x15) are included in the Gs400 1979 (n) (e01 E02 E04 E17 E18 E21 E22 E24 E25 E30 E34 E39) Special Market (e17) parts fiche.