Datsun 240Z brake cylinder. New Genuine Nissan OEM brake wheel cylinder for Datsun 240Z, 1970-72. There is not an aftermarket wheel cylinder available for the early 240Z rear brakes so these OEM Nissan units are the only "direct" replacement. We have had success with using the 1973-76 brake wheel cylinders on the early 1970-72, 240Z. It will require that you use the brake line form the 1973-76 cars. We have pre-bent stainless lines or you can bend one yourself. This helps to save money on your rear brake job. Choose from right or left.