This is either a silly question or an important question. You never know with these things. Anyway, off hand, does anyone know if the '83 US urq used the same proportioning valve as the '85 US urq? Thanks Anton Anton J. Gaidos, III 1991 200 quattro 20 valve Turbo 1990 90 quattro 20 valve 1985 quattro Turbo Coupe - Top 26 of the Century?