Subaru Impreza 2004 - Manual (Page 92)

PM-16
PERIODIC MAINTENANCE SERVICES
Fuel Line
8. Fuel Line
A: INSPECTION
The fuel line is located mostly internally, so check
pipes, areas near pipes, and engine compartment
piping for rust, hose damage, loose bands, etc. If
faulty parts are found, repair or replace them.
SOHC model
<Ref. to FU(H4SO)-63, Fuel Delivery, Return and
Evaporation Lines.>
DOHC Turbo model
<Ref. to FU(H4DOTC)-69, Fuel Delivery, Return
and Evaporation Lines.>