1965-1966 Chevy Impala Chrome IMPALA Letter Set. Here is a set of Impala Letters for your favorite Chevy. They are most excellent reproductions of the original. They feature show quality chrome and are die cast metal. They measure about 9/16" tall with 2 mounting pins that are about 1/2" long. Notice that the letters are sloped and wedged. The set (one side, as pictured) includes new nuts.