Perrin Front Mount Intercooler Boost Tube Kit Black 2002-2007 WRX / 2004-2007 STI | Stepped Diameter Aluminum Tubing | Boost Tube Kit
Overview
The Perrin Front Mount Intercooler Boost Tube Kit is a precision-engineered upgrade designed specifically for Subaru WRX models from 2002 to 2007 and WRX STI models from 2004 to 2007. This kit replaces the restrictive factory boost tubes with larger diameter, mandrel-bent aluminum tubes that optimize airflow between the turbocharger, intercooler, and throttle body. It is ideal for Subaru enthusiasts seeking to improve turbo efficiency and gain additional power without extensive modifications or immediate ECU tuning.
Built with a stepped diameter design, the boost tubes start at 2.25 inches near the turbo and expand to 2.75 inches at the intercooler and throttle body ends. This thoughtful engineering minimizes pressure drop and airflow restrictions, enhancing boost response and overall system efficiency. The tubes feature oversized beaded ends for secure hose connections capable of handling high boost pressures. Finished in durable black powder coat, the kit maintains a clean OEM+ look while resisting corrosion.
Beyond the boost tubes, the kit includes a powder-coated coolant overflow tank designed to provide clearance for the larger tubes and a robust steel intercooler support beam that improves durability over the factory aluminum bumper beam. Dyno testing confirms power gains of 10 to 20+ wheel horsepower without requiring ECU recalibration, making this kit a practical upgrade for both street-driven and performance-focused Subaru WRX and STI owners.
Features & Specifications
This Perrin Front Mount Intercooler Boost Tube Kit is engineered for 2002-2007 Subaru WRX and 2004-2007 WRX STI models and features stepped 2.25” to 2.75” diameter aluminum tubing. Constructed from CNC mandrel bent lightweight aluminum, it delivers improved airflow and boost response for Subaru enthusiasts seeking reliable power gains and OEM+ fitment.
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Brand: Perrin Performance
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Product: Front Mount Intercooler Boost Tube Kit Black
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Part Number: PSP-ITR-400-3BK
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Fitment: 2002-2003 WRX, 2004-2005 STI, 2004-2005 WRX, 2006-2007 STI, 2006-2007 WRX
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Material: Aluminum
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Finish: Black powder coat
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Construction: CNC mandrel bent tubing with beaded ends
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Origin: USA (Perrin Performance)
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Boost Tube Diameter: 2.25” (turbo side) to 2.75” (intercooler/throttle body side)
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Included Components: Boost tubes, coolant overflow tank, intercooler support beam
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Power Gains: +10-20+ Wheel HP (dyno proven)
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Tuning Required: No tuning required for stock ECU, tuning recommended for additional gains
Key Benefits
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Performance: Increased airflow reduces pressure drop, improving turbo efficiency and throttle response for sharper boost delivery.
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Durability: CNC mandrel bent aluminum tubing with a powder coat finish resists corrosion and maintains strength under high boost pressures.
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Fitment: Designed for direct bolt-on installation with OEM clearance and includes a coolant overflow tank for seamless integration.
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Power Gains: Dyno proven to add 10-20+ wheel horsepower without requiring ECU recalibration, unlocking more potential from your turbo system.
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Support & Protection: Steel intercooler support beam offers superior collision durability compared to the factory aluminum bumper beam.
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OEM+ Quality: Clean black powder coat finish complements the engine bay aesthetics while protecting components from wear and corrosion.
What's Included
- 1× Perrin Front Mount Intercooler Boost Tube Kit Black
- 1× Perrin Coolant Overflow Tank (powder coated)
- 1× Perrin Intercooler Support Beam (boxed steel, powder coated)
- Mounting hardware for boost tubes and support beam
- Installation instructions
Installation & Compatibility
Installation of the Perrin Boost Tube Kit is moderately straightforward for enthusiasts with basic mechanical skills and common hand tools. The kit is designed for direct bolt-on fitment with no permanent modifications required. The included coolant overflow tank provides necessary clearance for the larger boost tubes, simplifying installation. While no ECU tuning is required to realize power gains, tuning is recommended to optimize performance if additional modifications are present. Always verify fitment for your specific model year and trim before installation.
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Professional Installation: Recommended for those unfamiliar with turbo system components
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Modifications Required: None
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Verify Compatibility: Confirm fitment for your specific year and trim level within 2002-2007 WRX and 2004-2007 STI
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