Made from durable aluminum, this master cylinder features a bore diameter of 3/4 inches. Manufactured in the United States by the reputable brand Wilwood, this master cylinder ensures optimal braking efficiency and safety on the road. Removed from new Factory Five kit car. This is for brake or hydraulic clutch applications with remote reservoir. Uses 3/16 brake line with 3/8  24 threads. The last 2 pictures show the same master cylinder in the kit car.  (Used for the hydraulic clutch)    Comes as a kit with fittings and 1/4" hose.