Austin Healey, Aston Martin , Brake Booster Repair Kit (Deluxe)
MK2B boosters have a large band clamp holding the vacuum chamber together.
If your booster has a large band clamp holding the vacuum canister together you have a Girling MK2B unit, (Mark 2 B) then this is the correct kit, comes with the 7" rubber diaphragm.
If your booster has a flat cover vacuum chamber and a leather diaphragm then you have a Girling MK2A which uses a different kit, part # SP2228, see listing under Austin Healey brakes.
Cross reference#: 780-205, 021-173
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