Right off the turbo a smooth offset coupler carries the hot side air charge to a perfrectly matched 2.25" boost tube. We chose 2.25" tubing for a smoother, cleaner, obstruction free routing while still being large enough to flow more WHP than most turbos can put out. The air charge then is routed through the engine bay next to the battery, and down behind the radiator to the intercooler. The cold side boost tubes are mounted as high as possible in the engine compartment to clear all turbo and intake combinations as it traves to the throttle body through the engine bay.
Washer Tank for 2015+ Models
The Perrin Boost Tube Kit includes a Perrin Washer Fluid Tank. With how the boost tubes are routed through to the intercooler, the OEM tank conflicts with the space required. The Perrin Washer Fluid Tank is protected from the elements by a black powder coating finish.
Coolant Overflow Tank
The Perrin Boost Tube Kiut includes a Perrin Coolant Overflow Tank. It adds clearance for better boost tube routing, holds more coolant than previou designs and uses the OEM tank cap for a great seal! The Perrin Coolant Overflow Tank is protected from the elemnets by a black textured powder coating.
Perrin Boost Tubes are CNC mandrel bent from aluminum tubing for better weight reduction. Every boost tube has an over sized beaded end to ensure the hose clamps and couplers stay connected and sealed! We choose to take the smoothest shortest path to get air to and from the intercooler.
Every Perrin Boost Tube is powder coated for further protection from the elements, making it look awesome for years to come. Our boost tubes come in two finih options, texture powdercaoted black, and texture powder coated red.
- 2015-2019 WRX - (PSP-ITR-437-2BK/BK or PSP-ITR-437-2RD/BK)
- 2015-2019 STI - (PSP-ITR-438-2BK/BK or PSP-ITR-438-2RD/BK)
- 2008-2014 WRX - (PSP-ITR-436-2BK/BK or PSP-ITR-436-2RD/BK)
- 2008-2014 STI - (PSP-ITR-430-2BK/BK or PSP-ITR-430-2RD/BK)
- 2002-2007 WRX/STI - (PSP-ITR-400-2BK/BK or PSP-ITR-400-2RD/BK)
WARNING: Operating, servicing and maintaining a passenger vehicle or off-road vehicle can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. To minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service your vehicle in a well-ventilated area and wear gloves or wash your hands frequently when servicing your vehicle. For more information go to https://www.P65Warnings.ca.gov/passenger-vehicle.