RhinoPac Pre-Filled Clutch Master and Slave Cylinder Assembly (PS0485) In order to reduce warranty and downtime in difficult-to-bleed applications, AMS Automotive offers pre-filled clutch hydraulic systems. Fully bled system includes a master cylinder and slave cylinder, connected by the hydraulic line. No additional components are required. Designed for applications that typically include a pedal pulsation damper, but usually do not include a conventional bleed screw. The design of these components makes conventional bleeding difficult and time consuming. Late model hydraulic systems require a variety of complex bleed procedures. Obtaining this information is challenging, and bleeding these systems is even more difficult and time consuming. The pre-filled system reduces shop time and eliminates warranty. If the built-in pedal pulsation damper becomes contaminated, the system becomes nearly impossible to bleed. In addition, it is especially difficult to remove air from the damper. The pre-filled system eliminates these difficulties.