Parts such as the Brake House (gs4008): Lock Washer, Joint,brake Hose, Washer, Grommet are included in the Gs400 1977 (b) Usa (e03) Brake House (gs4008) parts fiche.
This schematic depicts all components used in the Gs400 1977 (b) Usa (e03) Brake House (gs4008) partslist.
The Gs400 1977 (b) Usa (e03) Brake House (gs4008) consists of thirteen pieces with the Hose,front Brake being the most expensive.