Perrin Subframe Lockdown Kit 2002-2007 WRX / 2004-2007 STI | Rear Subframe & Diff Stabilization | Suspension Upgrade
Overview
The Perrin Subframe Lockdown Kit is engineered to enhance the rear chassis rigidity of your 2002-2007 Subaru WRX or 2004-2007 WRX STI by reducing unwanted drivetrain movement and subframe flex. This kit targets the rear subframe and differential, locking them down to minimize slop and play that can negatively affect power transfer and handling precision. Ideal for enthusiasts seeking a more connected and confident driving experience, especially during aggressive acceleration, cornering, and shifting.
Designed with precision CNC-machined aluminum spacers and premium high-durometer urethane bushings, the Perrin kit balances durability with performance. The anodized aluminum components resist corrosion and maintain structural integrity over time, while the bushings provide firm yet compliant support to reduce noise and vibration. This approach reflects Perrin’s commitment to quality engineering and platform-specific solutions that improve Subaru chassis dynamics without compromising daily drivability.
By firmly securing the rear subframe and differential, this lockdown kit improves traction and chassis response, reducing wheel hop and enhancing rear-end stability under load. These benefits translate to a tighter, sportier feel that Subaru owners will appreciate on both street and track. The direct bolt-on design requires no permanent modifications, making it a practical upgrade for those looking to refine their WRX or STI’s handling characteristics.
Features & Specifications
This Perrin Subframe Lockdown Kit is engineered for 2002-2007 WRX and 2004-2007 WRX STI models and features CNC-machined aluminum spacers combined with high-durometer urethane bushings. Constructed from anodized aluminum and premium urethane, it delivers improved rear chassis rigidity and drivetrain stability for Subaru enthusiasts seeking enhanced handling and traction.
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Brand: Perrin Performance
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Product: Perrin Subframe Lockdown Kit 2002-2007 WRX / 2004-2007 STI
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Part Number: PSP-SUS-525
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Fitment: 2002-2007 Subaru WRX, 2004-2007 Subaru WRX STI
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Material: CNC-machined aluminum, high-durometer urethane
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Finish: Anodized aluminum
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Construction: CNC machined spacers with molded bushings
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Origin: Made in USA
Key Benefits
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Performance: Reduces rear subframe and differential movement for improved power transfer and traction.
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Handling: Minimizes wheel hop and enhances rear-end stability during acceleration and cornering.
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Durability: High-quality anodized aluminum and urethane bushings ensure long-lasting performance without premature wear.
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Fitment: Direct bolt-on design tailored specifically for WRX and STI models, requiring no permanent modifications.
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Quality: Precision CNC machining and premium materials uphold Perrin’s reputation for reliable Subaru performance parts.
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Value: Comprehensive kit includes all necessary components for a complete rear subframe lockdown upgrade.
What's Included
- 4× Perrin Diff Lockdown Bushings
- 2× Perrin Large Subframe Bushings
- 2× Perrin Subframe Bushings
- 2× M12 Hex Head Bolts
- 2× Metal Bolt Sleeves
- Installation Instructions
Installation & Compatibility
The Perrin Subframe Lockdown Kit features a direct bolt-on installation that is generally DIY-friendly for those with basic mechanical skills and common hand tools. No permanent modifications or special tools are required, making it accessible for enthusiasts looking to improve rear chassis rigidity without extensive disassembly. However, professional installation is recommended if you are unfamiliar with suspension components or torque specifications. This kit is specifically designed for 2002-2007 Subaru WRX and 2004-2007 WRX STI models; verifying exact year and trim compatibility before purchase is advised to ensure proper fitment.
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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 year and model
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