These reproduction rear leaf springs are designed for an exact, direct replacement of the originals. We offer single leaf (mono), four leaf and five leaf springs. Original single rear leaf springs can be replaced with multi leaf springs by simply replacing the U-bolts and adding shock extenders which allow the springs to set correctly. Mono leaf springs were originally installed on all 1967 Camaros and base model 1968-1969 Camaros. The four leaf springs were used exclusively on 1968-1969 Z-28 models and most 1970-81 Camaro models..Five leaf springs were originally installed on 1969 Super Sport models and 1968-81 standard applications and lower performance models. Front eye bushings are pre-installed.