Brake master cylinder GM style 1 inch. Universal GM style brake master cylinder. 1 inch bore, 9/16-18 & 1/2-20 ports on both sides. Includes blind plugs for plugging the other side. You might also need SKU #9128 and #9123 brake line fittings. This master cylinder is designed to be used with our brake pedals and seven inch booster. Sold each.
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