Perrin Front Mount Intercooler Boost Tube Kit Black 2008-2014 WRX | 2.25"-2.75" Diameter | Aluminum Boost Tubes
Overview
The Perrin Front Mount Intercooler (FMIC) Boost Tube Kit is designed specifically for the 2008-2014 Subaru WRX, offering a direct upgrade to the factory boost tube system. This kit replaces restrictive OEM piping with smooth, mandrel-bent aluminum tubes that optimize airflow from the turbocharger to the intercooler and throttle body. It’s ideal for WRX owners seeking improved charge air cooling efficiency and increased power potential without the need for extensive modifications.
Engineered with precision, Perrin’s boost tubes feature a stepped diameter design—2.25 inches at the turbo outlet expanding to 2.75 inches near the intercooler and throttle body. This sizing ensures maximum airflow capacity while maintaining a compact, efficient routing path that avoids interference with OEM components. The tubes are CNC mandrel bent from lightweight aluminum and finished with a durable black powder coat to resist corrosion and maintain a clean, OEM+ appearance.
Beyond airflow improvements, this kit includes a new coolant overflow tank and a robust intercooler support beam constructed from boxed steel, enhancing both functionality and durability. Dyno testing confirms gains of 10-20+ wheel horsepower across various power levels, achieved without requiring ECU tuning—though additional gains are possible with a proper tune. For Subaru WRX enthusiasts, this kit delivers a reliable, bolt-on upgrade that enhances both performance and engine bay aesthetics.
Features & Specifications
This Perrin Front Mount Intercooler Boost Tube Kit is engineered for 2008-2014 Subaru WRX models and features stepped boost tube diameters from 2.25” to 2.75”. Constructed from CNC mandrel-bent aluminum tubing with a black powder coat finish, it delivers improved airflow and durability for Subaru enthusiasts seeking enhanced charge air cooling and power gains.
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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-436-3BK
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Fitment: 2008-2010 WRX, 2011-2014 WRX
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Material: Aluminum
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Finish: Black powder coat
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Construction: CNC mandrel bent tubing
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Origin: USA (Perrin Performance)
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Boost Tube Diameter: 2.25” (turbo outlet) to 2.75” (intercooler/throttle body)
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Turbo Compatibility: Fits stock WRX 2-bolt flange and STI tube-style outlet
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Included Components: 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 recommended for additional gains)
Key Benefits
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Performance: Increased airflow reduces pressure drop, improving turbo efficiency and power output.
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Durability: CNC mandrel-bent aluminum tubes with powder coat resist corrosion and maintain strength under boost.
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Fitment: Designed for a smooth, short routing path that clears OEM components for easy installation and reliable operation.
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Compatibility: Includes adapters for both WRX and STI turbo outlets, ensuring broad application across WRX models.
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Support & Protection: Steel intercooler support beam offers superior crash protection compared to aluminum alternatives.
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Maintenance: New coolant overflow tank improves engine bay clearance and is finished for long-lasting protection.
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)
- Turbo adapter fittings for WRX and STI turbo outlets
- Installation instructions
Installation & Compatibility
Installation of the Perrin FMIC Boost Tube Kit is moderately straightforward for enthusiasts with basic mechanical skills and common hand tools. The kit is designed to bolt directly onto the factory turbo and intercooler connections with included adapters, minimizing the need for modifications. The new coolant overflow tank and support beam require removal of OEM components but come with detailed instructions to facilitate the process. No ECU tuning is required to safely run this kit, though a custom tune is recommended to maximize power gains and ensure optimal engine management.
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Professional Installation: Recommended for those unfamiliar with turbo plumbing
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Modifications Required: None beyond bolt-on installation
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Verify Compatibility: Confirm fitment for your specific WRX model year and turbo configuration
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