PERRIN 25mm Adjustable Rear Sway Bar for 2008-2021 Subaru WRX/STI. This direct-fit rear anti-roll bar increases rear roll stiffness and lets you tune handling with multiple adjustment positions for street or track preferences.

Engineered for drivers who want improved cornering balance without heavy modification, the 25mm diameter bar reduces body roll and sharpens turn-in response. Multi-position adjustment lets you fine-tune rear roll stiffness to match tires, alignment and driving style. The design fits OE mounting points to simplify installation and maintain proper suspension geometry, making it a practical upgrade for enthusiasts seeking better handling behavior while retaining day-to-day drivability.

Features

• 25mm diameter adjustable rear sway bar for WRX/STI (2008–2021)
• Multi-position mounting for tuning rear roll stiffness
• Direct-fit design to use factory mounting locations
• Improves cornering balance and reduces body roll
• Durable construction intended for road and occasional track use

If you have questions or want help selecting the right setup, call us directly — we have two locations offering installation and customization services: Austin, Texas and the Los Angeles, California area. Our phones: 512-982-9393 (TX) and 562-981-6800 (CA). Our staff can advise on fitment and setup options and schedule installation.

If you are considering multiple items, contact us for shipping discounts. We install on premises at both locations.

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