Perrin Rear Sway Bar 18mm Adjustable 2008-2021 WRX / 2008-2021 STI / 2013-2025 BRZ / 2022-2025 GR86 / 2013-2016 FRS / 2017-2021 GT86 | Adjustable Stiffness | Rear Suspension Upgrade
Overview
The Perrin Rear Sway Bar is a precision-engineered suspension upgrade designed to enhance the handling dynamics of multiple Subaru and Toyota platforms including the 2008-2021 WRX, 2008-2021 WRX STI, 2013-2025 BRZ, 2022-2025 GR86, 2013-2016 FRS, and 2017-2021 GT86. By increasing rear roll resistance, this sway bar reduces body roll and allows drivers to fine-tune vehicle balance for a more engaging and responsive driving experience. It is ideal for enthusiasts looking to improve cornering performance and overall chassis control without compromising daily drivability.
Perrin Performance approaches sway bar design with a focus on adjustability and durability. This 18mm rear sway bar features three distinct end link mounting positions, enabling drivers to select from multiple stiffness settings to best suit their driving style and conditions. The bar is finished in a glossy red powder coat that not only protects against corrosion but also adds a clean, OEM+ aesthetic under the vehicle. Perrin’s commitment to quality and fitment ensures a direct bolt-on upgrade that integrates seamlessly with the factory suspension components.
For Subaru owners, upgrading the rear sway bar is a straightforward way to influence handling balance, typically increasing oversteer to complement a stiffer front bar or to dial in a more neutral chassis feel. The adjustable nature of this sway bar means it can be tailored for street, track, or mixed use, providing versatility for enthusiasts who demand precise control. Whether paired with a front sway bar upgrade or used alone, the Perrin Rear Sway Bar delivers a tangible improvement in cornering stability and driver confidence.
Features & Specifications
This Perrin Performance Rear Sway Bar is engineered for Subaru WRX, WRX STI, BRZ, and Toyota 86/FRS platforms and features an 18mm diameter with three adjustable stiffness settings. Constructed from high-strength steel and finished with a durable red powder coat, it delivers enhanced roll resistance and handling precision for Subaru enthusiasts seeking improved chassis balance and cornering performance.
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Brand: Perrin Performance
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Product: Rear Sway Bar 18mm Adjustable
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Part Number: PSP-SUS-246
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Fitment: 2008-2021 WRX / 2008-2021 WRX STI / 2013-2025 BRZ / 2022-2025 GR86 / 2013-2016 FRS / 2017-2021 GT86
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Material: High-strength steel
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Finish: Glossy red powder coat
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Construction: Welded tubular steel
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Origin: USA
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Adjustability: 3-position end link mounting for stiffness tuning
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Diameter: 18mm
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Stiffness Increase (vs OEM): Ranges from 58% to 347% depending on vehicle and mounting position
Key Benefits
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Handling: Significantly reduces rear body roll for sharper cornering and improved chassis control
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Adjustability: Three mounting positions allow precise tuning of rear roll stiffness to match driving style and conditions
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Fitment: Direct bolt-on design ensures perfect fitment with factory suspension components across multiple Subaru and Toyota platforms
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Durability: Powder-coated steel construction resists corrosion and maintains appearance over time
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Balance: Helps dial in vehicle balance by increasing rear roll resistance, complementing front sway bar upgrades
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OEM+ Quality: Clean finish and precise manufacturing uphold the quality standards Subaru enthusiasts expect
What's Included
- 1× Perrin Rear Sway Bar 18mm Adjustable
- Mounting hardware for installation
- Installation instructions for WRX/STI and BRZ/FRS/GR86 platforms
Installation & Compatibility
Installation of the Perrin Rear Sway Bar is generally straightforward for those with basic mechanical skills and common hand tools. The direct bolt-on design requires no permanent modifications, though removal of factory sway bar components is necessary. Alignment after installation is recommended to ensure optimal handling performance. The adjustable end link positions allow for on-the-fly tuning without additional parts. Professional installation is recommended for those unfamiliar with suspension work to ensure proper torque specifications and safety.
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Professional Installation: Recommended for best results
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Modifications Required: None
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Verify Compatibility: Confirm fitment for your specific model year and trim before purchase
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