Wheel Cylinder OEM Left or Right 70-72 Early 240ZDatsun 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