Review on 🔧 Dorman M39791 Brake Master Cylinder - Brand New for Improved Performance by Robert Moloney

In terms of delivering the product on time, they do a good job when it comes to delivering it to you. But as for the item, I wouldn't recommend it until they figure out a way to correct the brake pressure generated. It has almost no stopping power. Dorman is a popular brand and for reasons unknown, this product doesn't live up to its name. I know that you often get what you pay for. But Revain is the perfect place to get branded items at a low price due to the volume of products sold. So people can sell goods cheaper. I am a certified technician for Ford, Lincoln, Mercury, Suzuki and a certified diesel technician for all makes and models. I am also a state-certified traffic inspector. I installed 2 of these master cylinders. They were both a bank vent, then a vehicle vacuum vent, a back and forth pressure vent, and a final gravity vent to try to solve the low pressure problem. which did not solve the problem. So I thought maybe the amp was defective for some reason. So I went to Auto Zone and got a Cardone Reman/Brake Power Booster part number: 53-2440 $137.99 and still hasn't been repaired. I then proceeded to replacing over 25 feet of vacuum lines just to rule it out. Eventually I went back to Auto Zone and bought a remanufactured A1 Cardone master cylinder for $58.29. and it worked perfectly. So I have no idea why this NEW Dorman master cylinder is not working.