Perrin Front Mount Intercooler Boost Tube Kit Red 2015-2021 WRX | 2.25"-2.75" Diameter | Boost Tube Kit

Overview

The Perrin Front Mount Intercooler Boost Tube Kit is designed specifically for the 2015-2021 Subaru WRX to optimize airflow between the turbocharger, intercooler, and throttle body. This kit replaces restrictive OEM boost tubes with larger diameter, smooth mandrel-bent aluminum tubing, improving charge air volume and reducing pressure drop. It’s ideal for WRX owners looking to maximize the efficiency of their front mount intercooler setup without the need for extensive modifications or tuning.

Engineered with precision CNC mandrel bending, the boost tubes feature a stepped diameter design—2.25 inches from the turbo outlet expanding to 2.75 inches near the intercooler and throttle body. This ensures smooth airflow transitions and minimizes turbulence, which is critical for maintaining consistent boost pressure and improving throttle response. The tubes are powder coated in a durable red finish, providing corrosion resistance and a clean, performance-oriented look under the hood. Included in the kit are custom CNC-machined aluminum brackets for secure mounting, as well as upgraded coolant and washer fluid tanks to accommodate the new routing.

Real-world benefits include a proven increase of 10 to 20+ wheel horsepower across various power levels, thanks to improved charge air cooling and reduced restrictions. The design maintains OEM clearance for easy installation and reliable operation without requiring ECU tuning, although additional gains can be unlocked with proper calibration. This kit is a practical upgrade for Subaru WRX enthusiasts seeking a balance of performance, reliability, and OEM+ fitment.

Features & Specifications

This Perrin Performance Front Mount Intercooler Boost Tube Kit is engineered for the 2015-2021 Subaru WRX and features stepped 2.25” to 2.75” diameter aluminum tubing. Constructed from lightweight CNC mandrel-bent aluminum, it delivers improved airflow and boost response for Subaru enthusiasts seeking enhanced intercooler efficiency and power gains.

• Brand: Perrin Performance
• Product: Front Mount Intercooler Boost Tube Kit Red
• Part Number: PSP-ITR-437-3RD
• Fitment: 2015-2021 Subaru WRX
• Material: Aluminum
• Finish: Powder Coated Red
• Construction: CNC Mandrel Bent Tubing
• Origin: Not Specified
• Boost Tube Diameter: 2.25” (Turbo Outlet) to 2.75” (Intercooler/Throttle Body)
• Included Components: Boost Tubes, Coolant Overflow Tank, Washer Fluid Tank, CNC Machined Brackets
• Power Gains: +10-20+ Wheel HP
• Tuning Required: No (Recommended for Additional Gains)

Key Benefits

• Performance: Increases airflow efficiency and reduces pressure drop for measurable horsepower gains.
• Fitment: Designed specifically for 2015-2021 WRX with direct bolt-on installation and OEM clearance.
• Durability: Powder coated aluminum tubing resists corrosion and maintains appearance over time.
• Installation: Includes custom CNC-machined brackets and upgraded coolant and washer tanks for seamless routing.
• Value: Provides significant power improvements without mandatory ECU tuning, making it accessible for stock setups.
• Quality: Precision CNC mandrel bending ensures smooth airflow and reliable sealing at all boost levels.

What's Included

• 1× Perrin Front Mount Intercooler Boost Tube Kit Red
• 1× Perrin Coolant Overflow Tank (Powder Coated)
• 1× Perrin High Capacity Washer Fluid Tank (6061 Aluminum)
• 1× Set of CNC Machined Aluminum Direct Mount Brackets
• Installation instructions

Installation & Compatibility

The Perrin Boost Tube Kit is designed for straightforward installation with direct bolt-on brackets and includes upgraded coolant and washer tanks to facilitate proper routing. While the installation is generally DIY-friendly for those with moderate mechanical experience, professional installation is recommended to ensure proper fitment and sealing. No special tools beyond standard hand tools are required. This kit does not require ECU tuning to realize power gains, but additional tuning is recommended to maximize performance if other modifications are present.

• Professional Installation: Recommended for best results
• Modifications Required: None
• Verify Compatibility: Confirm fitment for your specific 2015-2021 WRX model and trim

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