Subaru WRX Sway Bar - Rear - Perrin Performance - 22mm Adjustable - `08-`21. This PERRIN rear sway bar is a direct-fit option for 2008–2021 WRX and WRX STI models, offering adjustable roll stiffness to help fine-tune your car's handling for street or track use.

The 22mm adjustable design gives you multiple stiffness settings so you can adjust rear roll resistance to match tires, springs, or driving conditions. By increasing rear roll stiffness compared to stock, the bar helps reduce body roll, sharpen turn-in response, and improve mid-corner balance—useful for spirited driving, autocross or track days. It’s engineered for straightforward installation as a rear bolt-on replacement and is produced by PERRIN, a known supplier of Subaru performance components. This part is intended for owners who want precise, tunable handling changes without unverified claims or unnecessary extras.

Features

• 22mm adjustable rear sway bar for 2008–2021 WRX / WRX STI
• Multiple stiffness positions to tune handling balance
• Direct-fit replacement for the factory rear bar
• Designed and supplied by PERRIN Performance

If you have questions or want help confirming fitment, call us directly—our specialists can advise on setup and complementary parts. We have two installation and customization shops in Austin, Texas and the Los Angeles, California area and offer on-premises installation at both locations. Call: 512-982-9393 (TX) or 562-981-6800 (CA). If you’re considering purchasing multiple items, contact us for possible shipping discounts. We install on premises at both locations.

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