Subaru STI Sway Bar - Rear - Perrin Performance - 22mm Adjustable - `08-`21 is a direct-fit rear sway bar designed for 2008–2021 Subaru WRX/STI models. This Perrin 22mm adjustable bar is intended to give enthusiasts a straightforward way to refine rear roll stiffness and handling balance.

Built for drivers who want more control through turns, the Perrin adjustable rear sway bar lets you tune rear-end grip without drastic suspension changes. The 22mm diameter provides a noticeable change in torsional stiffness over stock, and the adjustable mounts allow fine-tuning of roll resistance to match driving style or track requirements. It's a practical upgrade for street and occasional track use, helping reduce body roll and improve mid-corner stability while retaining predictable behavior.

Features

• 22mm adjustable rear sway bar for 2008–2021 Subaru WRX/STI
• Multiple adjustment positions for tuning rear roll stiffness
• Manufactured by Perrin Performance
• Designed for improved cornering balance and reduced body roll

If you have questions or want help confirming fitment for your build, call us directly — we’re happy to walk through compatibility and setup. We have two installation and customization locations in Austin, Texas and the Los Angeles, California area and offer on-site installation at both shops. Call us at 512-982-9393 (TX) or 562-981-6800 (CA) for details, quotes, or to schedule installation. Thinking about purchasing multiple items? Contact us for potential shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov