Description
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.