Replace the restrictive OEM plastic charge pipe and increase airflow and intercooler efficiency with the PERRIN Charge Pipe for 2015+ WRX!
The OEM charge pipe on the FA20DIT engine is restrictive, narrows at certain points, and has pleats to create an uneven air flow. The Perrin charge pipe has a perfectly smooth interior, constant radii, and gradual bends, making for much more efficient air delivery. All this combined creates increased intercooler efficiency.