The Racer X Fabrication master cylinder brace for the 2013+ Scion FR-S / Subaru BRZ eliminates deflection from the master cylinder during braking. The master cylinder can deflect as much as 1/16 of an inch, with the Racer X Fabrication master cylinder brace this eliminates deflection. The cylinder brace provides better feedback during braking and lets you concentrate on driving. The master cylinder brace is CNC machined from 6061-T6 aluminum and bolts to the driver side strut tower.