Some '57 i saw on factory photos (owner's manual, B&W pics on the "Imperial photo archive" book) have these "small protusion" but i never saw a production '57 Imperial with them ! The passenger car parts list doesn't list them. Curiously the Imperial on the '57 Prestige Catalog have the production bumper w/o protusions. . About hood pad, my '57 had one, the only remaining material is under the braces of the hood.. -- Philippe COURANT (Pau, France) Imperial 57 Crown convertible Buick 58 Roadmaster sedan - American Car Club de France (ACCF) : http://www.accf.com - Chrysler Imperial France : http://www.ifrance.com/c-i-f - Cadillac " Standard of Excellence " : http://www.ifrance.com/accf-cad - SportsCars : http://www.ifrance.com/accf-sprtcar