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Master Cylinder Brace for 2015-17 WRX/STI


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Part Number:
PSP-BRK-403 = 2015-16 WRX/STI

Was: $150.00
Sale: $135.00
Save: 10%
Save: $15.00


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

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.

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.


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

5 Year Warranty

PERRIN Performance warrants to the original purchaser that all PERRIN products will be free from defects in material and workmanship within a sixty (60) month period from the date of purchase. *Some exclusions apply
» Read Full Warranty


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Warranty Details

This product features a 5 year warranty Read Full Warranty

Tech Department


Compatibility Detail


2015-2017 Subaru WRX Yes
2015-2017 Subaru STI Yes
2013-2016 Subaru Crosstrek Yes
2014-2015 Subaru Forester XT Yes
2014-2015 Subaru Forester Yes

*Left hand drive models only.

In The Box

In The Box

(1) PERRIN Master Cylinder Brace
All installation hardware


Shipping Information

  • Item Requires Shipping
  • 3.0 lbs.
  • W3.0000” x H8.0000” x L14.0000”
  • This item ships in its own box.