Buy 2003 Subaru Impreza Gasket Air Intake Duct. Intercooler If your 2003 Subaru Impreza is equipped Intercooler, Acceleration - OEM Subaru Part # 14497AA030

GASKET-AIR INTAKE DUCT Engine Air Intake Hose Seal

Fits Forester, WRX

Intercooler
If your 2003 Subaru Impreza is equipped with a turbo and you've noticed a reduction in acceleration or a hissing on acceleration accompanying your check engine light, your intercooler or its piping/tubes may need to be repaired or replaced.