The master cylinder is used in disc/disc brake system, whose bore diameter is 1”. The disc brake cylinder has a deep hole, and packed with a bullet adaptor.There are only two ports on left sides, which are 9/16-18” & 1/2-20”. The material of the brake master cylinder is cast iron and the surface is black painted.It can be used for boosted and non-boosted applications
1967-1969 Camaro
1967-1972 Chevelle
1967-1974 Nova