PERRIN PSP-BRK-400 Master Cylinder Brace for 2002–2007 WRX STI

PERRIN Master Cylinder Brace (PSP-BRK-400)

The PERRIN Master Cylinder Brace PSP-BRK-400 is designed to eliminate flex in the factory brake master cylinder on early turbo Subaru platforms. Under hard braking, the OEM master cylinder can move forward, reducing pedal firmness and feedback. This brace reinforces the master cylinder against the firewall, resulting in a firmer brake pedal, improved modulation, and more consistent braking response—especially during spirited driving or track use.

Key Features

• Reduces brake master cylinder flex under hard braking

• Improves brake pedal stiffness and responsiveness

• Enhances pedal feel and driver confidence

• CNC-machined aluminum construction for strength and durability

• Direct bolt-on installation with included hardware

Construction & Specifications

• Body Material: 6061-T6 aluminum

• Finish: Anodized

• Function: Reinforces brake master cylinder to reduce flex

What’s Included

• (1) PERRIN Master Cylinder Brace

• All required mounting hardware

• Warranty & installation instructions

Vehicle Fitment

Fits select early turbo Subaru models, including:

• 2002–2007 Subaru Impreza WRX

• 2004–2007 Subaru Impreza WRX STI

• 2003–2007 Subaru Forester XT