Get the most stopping power out of your Miata’s brake system using the 1″ bore Wilwood master cylinder kit. This master cylinder upgrade is made to work with modified brake systems utilizing larger piston area calipers. The kit helps reduce pedal travel while achieving solid pedal feel & modulation. Excellent upgrade for MX5’s that see heavy track use. Add the Master Cylinder Brace for a truly solid pedal feel to go along with the increased braking power.