Perrin Brake Master Cylinder Brace – Subaru 15-20 WRX, WRX STi, 13-17 Crosstrek & 14-18 Forester



SKU: PSP-BRK-403 Category: Tags: , , Brand:

Installation Instructions & Videos

Installation Instructions


The PERRIN Master Cylinder Brace prevents unwanted movement of the master cylinder, allowing for increased brake pedal stiffness.

Stiffen Brake Pedal Feel

The PERRIN Master Cylinder Brace significantly reduces flex at the firewall, so you get solid brake pedal feel with every application of the brakes. This is very noticeable while under heavy braking and even slowing for a stop sign. The difference can immediately be felt after installation.

Reduce Flex

Your brake pedal is connected to the thin sheet metal firewall which flexes as you apply the brakes. The firewall is not stiff enough to deal with the constant and repeated forces while applying the brakes. The PERRIN Master Cylinder Brace creates a bridge between the firewall, master cylinder, and shock tower, significantly reducing flex in the firewall while braking.


When possible we try to design Master Cylinder Braces in one piece to improve rigidity. The PERRIN Performance Master Cylinder Brace for the 2015 WRX/STI is CNC machined from a large piece of 6061-T6 billet aluminum for extreme stiffness. With stainless steel hardware and an anodized finish, the PERRIN Master Cylinder Brace will look great and last the life of the car, even in the harshest conditions.


The PERRIN Master Cylinder Brace is design to attach strategically to multiple points on the shock tower. This helps reduce flex in the brake master cylider by creating a solid connection between it and the chassis. To further aid in stiffening or tightening up this connection, included is an adjustable screw that allows tension to be preloaded on the master cylinder.


Anodized black or neon yellow with a vivid PERRIN logo, the PERRIN Master Cylinder Brace is guaranteed to continue looking great while being used.

Weight1.0 kg
Dimensions25 × 18 × 12 cm

Black, Neon Yellow


There are no reviews yet.

Be the first to review “Perrin Brake Master Cylinder Brace – Subaru 15-20 WRX, WRX STi, 13-17 Crosstrek & 14-18 Forester”

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.


Models suitable for this product

SubaruForester2014 - 20182.5i
SubaruForester2014 - 2018XT
SubaruWRX2015 - 2020
SubaruWRX STi2015 - 2020
SubaruXV Crosstrek2014 - 2017

Got something to discuss?