Brake and clutch master cylinders should be rebuilt?before?they fail! Top racing teams rebuild master cylinders at least once each season for best reliability.his rebuild kit fits the OBP 3/4 Bore Remote Reservoir Master Cylinder (Part No. 3519-101-75) and the OBP 3/4 Bore Integral Reservoir Master Cylinder (Part No. 3519-102-.75). Each kit includes a complete piston and spring assembly with all rubber seals already installed. You get a complete set of new internals, already assembled and ready for installation. Just lubricate the seals and drop it in! Sold individually; one kit is enough to rebuild one master cylinder.
