9IN Dual Diaphragm Air Booster Pump - High Pressure Black for Air Tools, Hydraulic Systems & Industrial Applications

This brake booster is not adjustable and DOES NOT work with wilwood master cylinder. No instructions in the box no warning any where in the information. It uses a plunger instead of the normal adjustable pin and only way to adjust it is to have the plunger machined down. Not sure what I am going to do with it. Deffinitly not universal.