Why It Matters
GS joined high-performance springs and shocks, 3.42 positive traction, chrome engine dress, and identification.
Also Known As
1966 Riviera GS
Part profile
1966 Riviera Gran Sport package
option · Buick
Used On
1 linked car page.
two-door fastback sport coupe
1966 Buick Riviera Gran Sport
MW 425, 340 gross hp