MGB from August 1971 to June 1976: Roadster from GHN5-258001 to GHN5-409401, GT from GHD5-258004 to GHD5-406357 - please note: when using in earlier models, the radiator must be offset by about 5-10 mm to the front • optional on TB, TC, TD and TF (1939-55) plus YA, YB and YT (1947-53)