Perrin Performance Afta-Maf Hose Black Subaru 2002-2007 WRX / 2004-2007 STI

Simple to install and easy to appreciate, the AFTA-MAF is an eloquent compliment to every engine bay. Replaces the factory corrugated rubber hose between the inlet tube and air box. By removing the pleats found in the OEM hose, the increased air flow makes more horsepower, decreases turbo spool time, and improves acceleration.