Master cylinder has been sleeved in brass and brought back to standard size. Fits all N600 Sedans and Z600 Coupes with a 3/4" master cylinder. The master cylinder has the size cast on it's passenger side. Restore safe braking and limit internal corrosion. Rebuild kits are listed below. Cylinder is sold exchange--we require your old one. This is a sleeved cylinder only and it does not include the internal parts. You will reuse your own pistons and use a new seal kit and other parts to complete.