Cycle Shack 1-3/4in. Tapered Muffler Pipes for 1957-1985 Harley Davidson XL Mot 1-piece pipes designed to enhance the performance and styling Not legal for use on catalyst equipped models 1979 Sportsters require P-clamps for mounting 57-03 pipes heat shields sold seperately Brake pedal stop required on 80-87 Sportster Models