Raybestos CMA39913 Hydraulic Clutch Master Cylinder is a hydraulic actuator for manual-transmission clutch systems, converting pedal movement into hydraulic pressure to disengage the clutch. The CMA39913 is the Raybestos part number for this clutch master cylinder and is described in listings as a professional‑grade clutch master cylinder in the Raybestos CMA series. Designed for use in vehicles with hydraulic clutch actuation, this master cylinder interfaces with the clutch hydraulic circuit to actuate the slave cylinder when the pedal is pressed.
