Impreza RS Coupe AWD F4-2.5L SOHC (1999)
2. Remove resonator chamber (2200 cc California spec. vehicles).
3. Disconnect connector from mass air flow sensor (Except 2200 cc California spec. vehicles).
4. Loosen clamp which connects air intake duct and air intake chamber (Except 2200 cc California spec. vehicles).
5. Remove clips of air cleaner upper cover (Except 2200 cc California spec. vehicles).
6. Remove air intake duct and air cleaner upper cover as a unit (Except 2200 cc California spec. vehicles).
7. Remove air cleaner element (Except 2200 cc California spec. vehicles).