Description
The Perrin Front Mount Intercooler Boost Tube Kit is designed specifically for the 2008-2014 Subaru WRX STI, delivering improved airflow and enhanced charge air cooling. This kit replaces the restrictive OEM boost tubes with mandrel-bent aluminum tubing, increasing diameter from 2.25 inches at the turbo outlet to 2.75 inches near the throttle body. It’s ideal for STI owners looking to maximize their intercooler efficiency and support higher power levels without compromising reliability or fitment.
Engineered with precision, the boost tubes feature smooth, mandrel bends that optimize airflow while maintaining clearance around factory components. The oversized, beaded ends ensure secure hose connections at any boost level, preventing leaks and pressure loss. The kit also includes a powder-coated red finish for durability and visual appeal, along with a new coolant overflow tank to provide necessary clearance for the upgraded routing. Perrin’s focus on quality materials and thoughtful design makes this kit stand out as a reliable upgrade for Subaru enthusiasts.
By reducing pressure drop and improving charge air cooling, this boost tube kit supports power gains of 10 to 20+ wheel horsepower across various tuning stages. Notably, the kit is designed to work safely without requiring ECU recalibration, allowing for a straightforward power increase out of the box. For those pursuing further performance, additional gains are achievable with proper tuning tailored to all vehicle modifications. This combination of performance, fitment, and ease of installation makes the Perrin boost tube kit a practical upgrade for WRX STI owners seeking to enhance their turbo system’s efficiency.