No Tuning Required Increase horsepower and torque without ECU recalibration or tune! This part is designed and tested to work safely on your vehicle without any tuning required! However, more power can be gained with proper ECU tuning! Better Airflow The OEM charge pipe on the WRX engine is restrictive, narrows down in certain points, and has pleats that make for uneven airflow. The Perrin Charge Pipe has a perfectly smooth interior, constant radii, and gradual bends, making for much for efficient air delivery. This all combines to increase horsepower and improve boost response. Connectors & Compatibility The Perrin Charge Pipe comes with all necessary connectors to install onto a stock system for greater compatibility. The CNC-machined Perrin turbo flange adapter uses the same design as the OEM flange on the turbo side of the charge pipe and uses the OEM O-Ring for perfect fitment and no leaks, unlike off-the-shelf O-rings. The silicone connectors are reinforced and multi-layered for durability and weather resistance. Construction Perrin Charge Pipes are constructed from aluminum tubing, which is precision CNC mandrel bent, for consistent and perfect fitting parts. Finish Powder-coated for protection from the elements, the glossy neon yellow, or pink will accent your show car while the classic textured red and black finish will look awesome for years to come!
