PERRIN PSP-BRK-403BK Master Cylinder Brace for 2015-2021 Subaru WRX/STI

Vehicle Fitment

• 2015-2021 Subaru WRX/STI (all trims, manual and automatic; LHD only)

Features

• CNC-machined 6061-T6 billet aluminum construction
• Black anodized finish with white PERRIN logo
• Braces master cylinder to shock tower to eliminate firewall flex
• Improves brake pedal firmness and consistency
• Adjustable preload bolt for fine tuning rigidity
• Includes stainless steel mounting hardware and tools
• Direct bolt-on design - no drilling or modifications required
• Covered by PERRIN 5-year limited warranty

Specifications

• Material: 6061-T6 billet aluminum
• Finish: Black anodized
• Fitment: Front firewall to driver-side shock tower brace
• Drivetrains: Manual and automatic (LHD only)
• Weight: Approximately 1.5 lb (0.68 kg)
• Warranty: 5-year limited

Included Components

• 1x PERRIN Master Cylinder Brace (PSP-BRK-403BK)
• 1x adjustable M12 preload bolt and jam nut
• 3x M6 socket cap screws
• 1x M8 socket cap screw and washer
• 1x M12 socket set cup
• Hex keys (M5 & M6)
• 1x installation instructions and warranty card

Product Description

The PERRIN PSP-BRK-403BK Master Cylinder Brace significantly reduces brake pedal mush by reinforcing the firewall area between the master cylinder and driver-side shock tower. CNC-machined from strong 6061-T6 aluminum and finished in sleek black anodizing, this brace bolts directly onto 2015-2021 WRX and STI models (LHD only), delivering noticeably firmer pedal feel under both street and track conditions :contentReference[oaicite:0]{index=0}.

The preload-adjustable bolt lets you dial in the perfect rigidity level, while the included stainless hardware ensures durability. With a direct-fit, no-drill installation and backed by a 5-year warranty, this brace is ideal for enthusiasts looking to improve braking feedback and control on their WRX/STI :contentReference[oaicite:1]{index=1}.