Review on 🔧 Dorman M630283 Brake Master Cylinder - Brand New for Improved Performance by Jose Haskin

This is an OEM MC and tank in every respect. It installs with four screws and the only highly recommended step is to bleed the bench to save effort after installation. Got a supply of blood? No, I installed them and then bled and filled them, but bench bleed results in faster performance. I had a soft pedal in my Silverado 03 (not everyone!) and I replaced all the brake lines due to rust so while the system was drained I replaced the MC and flex lines (same manufacturer). After that the pedal was like new. I bled the system THEN took it to my local shop to bleed again, this time with the ABS module open using their software tool (mine won't do this part). He still has two small blisters!