This 1955-1956 Chevrolet Rear End Housing is an original used GM part. The 1955-1957 has the rubber nobs near the end. The difference between 1955-1956 and 1957, the 1955-1956 has a thicker bearing than the 1957. Also the 1957 has a plug on the bottom.
Fits: BelAir, 210, 150, Impala, Super Sport, Biscayne
Fits: 2 or 4 Door Hardtop/Sedan, Convertible and Wagon