PERRIN 15-21 Subaru WRX/STI / 13-17 Crosstrek / 14-18 FXT / 13-16 Impreza Master Cyl. Brace - Black

This Perrin Master Cylinder Brace is what you get in the box: the brace itself, all necessary hardware, and instructions for installation. It's designed to stiffen up the firewall where the master cylinder mounts on your 2015-2020 Subaru WRX STI. Many owners notice a bit of flex in this area, especially during hard braking or spirited driving, which can make the brake pedal feel a little mushy or less responsive than you'd like.

By adding this brace, you're essentially tying the master cylinder directly to the strut tower brace mounting points. This significantly reduces the firewall's flex under load. The result is a firmer, more consistent brake pedal feel. You'll notice improved feedback, which can be a real confidence booster when you're pushing the car. The brace is made from well-built aluminum and comes in a black finish to look good under the hood.

Installation is fairly straightforward, usually bolting up to existing points. It's a popular modification for WRX STI owners looking to get more out of their braking system without changing out the master cylinder or brake lines themselves.