PERRIN Performance PSP-SUS-248 25 mm Adjustable Rear Sway Bar for 2008-21 Subaru

Vehicle Fitment

• 2008-2021 Subaru WRX (2.5L Turbo H4, AWD)
• 2008-2021 Subaru WRX STI (2.5L Turbo H4, AWD)
• 2013-2025 Subaru BRZ (2.0L/2.4L H4, RWD) - fitment listed through 2025 for BRZ/GR86 adaptation
• 2013-2025 Toyota GR86 (2.4L H4, RWD) - shared platform, same application

Features

• 25 mm diameter rear sway bar designed for reduced body roll and improved handling
• Adjustable mounting holes provide tuning for understeer/oversteer balance
• Pre-lubricated polyurethane bushings for smooth operation and long life
• Black powder-coated finish for corrosion resistance and clean aesthetic
• Direct-fit replacement for factory rear anti-roll bar - no major modifications required
• Designed for performance street & track use without major comfort compromise
• Includes hardened mounting hardware and installation instructions for correct setup
• Improves chassis response, sharper cornering, and better driver feel

Specifications

• Bar diameter: 25 mm (approx. 0.98")
• Position: Rear anti-roll (sway) bar assembly
• Material: High-strength alloy steel with precision bends and powder coat finish
• Bushing type: Tapered polyurethane (pre-lubed) for durability under load
• Mounting: Includes two bushings and all necessary bolts/brackets for rear installation
• Adjustability: Multiple mounting holes allow changing rate from softest (front hole) to stiffest (rear hole) - note: stiffest setting will increase oversteer tendency

Included Components

• 1x PERRIN 25 mm Rear Sway Bar (PSP-SUS-248)
• 2x Rear sway bar polyurethane bushings (pre-lubed)
• 2x Bushing mounting brackets (pre-installed or supplied)
• 4x Mounting bolts and washers (grade as required)
• 1x Suspension grease packet (for bushing lubrication)
• Installation instructions and warranty documentation

Product Description

The PERRIN Performance PSP-SUS-248 25 mm Adjustable Rear Sway Bar is engineered for drivers of the Subaru WRX and WRX STI (2008-21) and the Subaru BRZ/Toyota GR86 (2013-25) who demand sharper handling, reduced body roll and better feedback in cornering. By upgrading from the stock rear anti-roll bar to this sturdier 25 mm unit, the chassis becomes more composed under lateral loads, allowing the suspension to work more efficiently and improving overall driver confidence.

Installation is straightforward: remove the factory rear sway bar, install the PERRIN bar with the supplied polyurethane bushings and brackets, choose the mounting hole that best suits your driving style (softer for street/comfort, stiffer for track/aggressive), torque hardware to spec and check for full articulation. Because this sway bar is significantly stiffer than stock, you may notice a firmer rear end - this is intentional for performance handling benefits. Note: Use caution when selecting the stiffest mounting hole, as it may increase the vehicle's propensity to oversteer.

Fitment has been confirmed through the 2021 model year for WRX/STI and is listed through 2025 for BRZ/GR86 platform applications. If you are using a later model (especially beyond 2025) or a non-standard trim/engine, please verify compatibility with PERRIN or your local distributor prior to purchase.