84-92 TPI Camaro Firebird Disc Brake Master Cylinder

Used brake master cylinder. Thisis for cars with rear disc brakes. GM had several different master cylinders. Some were cast iron and some were aluminum. Some used different thread fittings. So we would need to get all the info on your original. Fits the following:

84-92 Camaro w/ Rear Disc Brakes
84-92 Firebird/Trans Am w/ Rear Disc Brakes