PERRIN Performance PSP-SUS-531BK Rear Subframe Lockdown Kit for 2015-25 Subaru

Vehicle Fitment

• 2015-2025 Subaru WRX (2.0L/2.4L Turbo H4, AWD)
• 2015-2025 Subaru WRX STI (2.5L Turbo H4, AWD)
• 2022-2025 Subaru BRZ (2.4L H4, RWD)

Features

• Precision-machined bracketry designed to lock down the rear subframe for improved chassis stability
• Reinforces mounting points to reduce subframe movement under hard acceleration, braking and cornering
• Black anodized finish ("BK" suffix) for corrosion resistance and sleek appearance
• Direct-bolt replacement - no welding or modifications required for listed vehicles
• Improves road-feel and driver feedback by minimizing drivetrain and subframe flex
• Ideal for track use, performance street applications or lowered suspension setups
• Includes all required hardware and spacers for installation into compatible vehicles
• Backed by PERRIN's documented quality control and support network

Specifications

• Location: Rear subframe lockdown kit (rear suspension & chassis interface)
• Material: High-strength billet aluminum and steel hardware (anodized black finish)
• Finish: Hard-coated black anodize
• Hardware: Full installation kit including mounting bolts, spacers and instructions
• Driveshaft compatibility: Works with AWD (WRX/STI) and RWD (BRZ) platforms in listed years without special adapters

Included Components

• 1x PERRIN Rear Subframe Lockdown Kit (PSP-SUS-531BK)
• 2x Billet aluminum lockdown brackets (left & right)
• 2x Stainless steel spacers
• 4x High-grade mounting bolts
• Installation instructions and warranty documentation

Product Description

The PERRIN PSP-SUS-531BK Rear Subframe Lockdown Kit is engineered for the driver who demands the ultimate in chassis rigidity from their Subaru WRX, WRX STI or BRZ. By locking down the rear subframe more securely into the chassis, the kit significantly reduces unwanted movement under load - meaning less deflection during hard acceleration, cornering or braking and improved transmission of driver inputs into vehicle response.

Installation is straightforward for anyone familiar with suspension modifications: remove the factory hardware, install the billet brackets and spacers, torque to specified values and double-check clearance. Because the kit addresses subframe movement rather than suspension travel, you will notice a sharper, more connected feel rather than a change in ride height or damping. Suitable for performance street or track use.

Fitment has been confirmed for 2015 through 2025 model years of the WRX and WRX STI, and 2022 through 2025 for the BRZ. If you are using models outside these year ranges or non-standard trims (limited editions, regional variants) please verify compatibility directly with PERRIN or authorized distributor.