Valve Intake 1.563 inch MGB 68 to 72, 75 to 80

Intake Valve MGB 1.563 inch diameter. This valve was originally used from 1968 to 1972 and then from 1975 to 1980. The bigger 1.625 valve can be used in it's place. Cross Ref.# 1/555, 34351, 423-125