Perrin Black Rear Strut Tower Bar 2015-2021 WRX / 2015-2021 STI | Carbon Fiber Construction | Chassis Reinforcement
Overview
The Perrin Black Rear Strut Tower Bar is designed specifically for the 2015-2021 Subaru WRX and WRX STI models to enhance chassis rigidity and improve steering precision. By connecting the rear shock towers, this brace effectively eliminates flex during cornering and high-load driving situations, providing a more responsive and stable driving experience. It is an ideal upgrade for enthusiasts seeking to sharpen handling characteristics without compromising daily drivability.
Engineered with a focus on strength and lightweight construction, this rear strut tower bar features a 100% carbon fiber hollow bar paired with CNC machined aluminum mounting feet finished in black anodized coating. Perrin’s use of diagonal woven carbon fiber fabric ensures superior stiffness compared to traditional aluminum tubing, while maintaining a sleek, OEM+ aesthetic that complements the VA chassis. The precision manufacturing and robust hardware assembly reflect Perrin’s commitment to quality and performance.
In real-world driving, the Perrin rear shock tower brace transfers loads between the shock towers during cornering, reducing chassis flex and understeer. This not only improves steering feedback and vehicle balance but also helps reduce tire wear and metal fatigue around the shock tower mounting points. For Subaru WRX and STI owners, this upgrade translates to a more connected and confident driving experience, especially on twisty roads and track days.
Features & Specifications
This Perrin Black Rear Strut Tower Bar is engineered for 2015-2021 Subaru WRX and STI models and features a 100% carbon fiber hollow bar with CNC machined aluminum feet finished in black anodized coating. Constructed from lightweight carbon fiber and aluminum, it delivers enhanced chassis rigidity and improved steering precision for Subaru enthusiasts seeking sharper handling and reduced chassis flex.
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Brand: Perrin Performance
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Product: Black Rear Strut Tower Bar
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Part Number: PSP-SUS-041BK
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Fitment: 2015-2021 Subaru WRX / 2015-2021 Subaru WRX STI
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Material: 100% Carbon Fiber (bar), Aluminum (mounting feet)
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Finish: Black anodized (aluminum feet)
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Construction: CNC machined aluminum feet, carbon fiber hollow bar
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Origin: Not specified
Key Benefits
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Performance: Reduces chassis flex and understeer for sharper cornering response
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Durability: Carbon fiber construction resists fatigue and maintains stiffness over time
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Fitment: Designed specifically for VA chassis WRX and STI for precise, bolt-on installation
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Quality: CNC machined aluminum feet with anodized finish ensure corrosion resistance and longevity
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Weight Savings: Lighter than traditional aluminum tubing, minimizing added mass
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Maintenance: Helps reduce tire wear and metal fatigue around shock towers
What's Included
- 1× Perrin Black Rear Strut Tower Bar
- 1× Mounting Foot, Left
- 1× Mounting Foot, Right
- All necessary mounting hardware
- Installation instructions
Installation & Compatibility
Installation of the Perrin Rear Strut Tower Bar is straightforward and generally DIY-friendly for enthusiasts with basic hand tools. The bar mounts directly to the rear shock towers using the included CNC machined aluminum feet and hardware, requiring no modifications to the vehicle. No special tools are necessary beyond standard sockets and wrenches. This brace is designed exclusively for 2015-2021 Subaru WRX and WRX STI models; verifying your specific year and trim is recommended to ensure proper fitment. No tuning is required as this is a chassis reinforcement component.
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Professional Installation: Recommended for those unfamiliar with suspension components
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Modifications Required: None
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Verify Compatibility: Confirm fitment for your specific 2015-2021 WRX or STI model
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