Rear Main Seal is made from a GraphTite rope material for the 1934-53 Buick 8 cylinder 40, 50 series. The RMS is not used from 1934-38.
The short side seal is specifically for the small series engines.
Cylinders: 8
Fuel-Type: gas
Valve-Type: overhead
Bore-Size: 3.09375", 3.1875"
Makes: Buick,
Models: Super, Special, 40, 50,
Engine Models: 233, 248, 263 cubic inches,
Compatable Years: 1934, 1935, 1936, 1937, 1938, 1939, 1939, 1939, 1940, 1940, 1940, 1941, 1941, 1941, 1942, 1942, 1942, 1943, 1943, 1943, 1944, 1944, 1944, 1945, 1945, 1945, 1946, 1946, 1946, 1947, 1947, 1947, 1948, 1948, 1948, 1949, 1949, 1949, 1950, 1950, 1950, 1951, 1951, 1951, 1952, 1952, 1952, 1953, 1953, 1953,
