Review on Raybestos MC39612 Professional Master Cylinder by Sandro Pierce

First, the discount price of $46 (including shipping) is pretty good for this Raybestos brand master cylinder. I replaced the stock master cylinder on my 1991 Toyota Camry (4 cylinder, non ABS) with this part and it has worked great for the last few hundred miles. I was initially concerned when I saw that it was made in Taiwan (rather than AISAN branded OEM, made in Japan as other adverts show) but I went for a replacement anyway after finding the required vent on the stand had performed. It fits perfectly and requires no pedal force adjustment. After bleeding the brakes, the brake was like new again. Therefore I can recommend this product for quality and fit for a car of my year and model. One comment I would like to make is that there were no pump instructions included in the box. The bench bleeding procedure for this part is very different from what you see on youtube, web autoblogs, and aftermarket car manuals. The two openings must be sealed with plugs (supplied) and the cylinder clamped in a vise. The reservoir is filled and the open end of the plunger is pushed in and out several times until no more bubbles enter the reservoir. It may take several presses and releases to ensure all air is removed. Almost every other source advises you to connect tubing (not included) from the ports back to the reservoir, or plug the ports with your fingers while releasing the plunger once pushed in. The latter methods might work well for you, but they are more complicated and messy.